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Heavy! “2022 China Optics Top Ten Progress” released


On the evening of April 20, China Laser Magazine released the “2022 China Optics Top Ten Progress”.
After multiple rounds of selection by the review committee, 10 cutting-edge advances such as “new silicon-based optoelectronic on-chip integrated system driven by microcavity optical comb” were selected as “2022 Top Ten Advances in Chinese Optics” (basic research category); 10 advances such as “Integrated Imaging Chip to Achieve Aberration Correction 3D Photography” were selected as “2022 Top Ten Advances in Chinese Optics” (applied research category). In addition, 20 achievements, such as microwave-optical wave coherent conversion, whose efficiency broke through the limit of quantum unclonability for the first time, and the realization of high-dimensional quantum computing chips, won the nomination award of “2022 China Optics Top Ten Progress” (basic research category) and “2022 China Optics Top Ten Progress” nomination award (applied research category) respectively.
The “Top Ten Progress in Chinese Optics” selection activity was initiated by China Laser Magazine and has been successfully held for 17 sessions, aiming to promote the wide dissemination of China’s excellent optical research results and promote the development of China’s optical industry. With its high academic level of candidates and strict and fair evaluation mechanism, this award is highly recognized by the industry and has a high degree of credibility and influence.
Basic Research (10 items)
1. New silicon-based optoelectronic on-chip integrated system driven by microcavity photocomb
The team of Wang Xingjun of Peking University and the team of John E. Bowers of the University of California, Santa Barbara to solve the problems of simple and robust excitation and long-term stability of microcavity light comb, silicon-based system design for comb light source, reconfigurable multi-dimensional spectral shaping technology on silicon substrate, etc., realized a new silicon-based optoelectronic on-chip system driven by Kerr microcavity comb for the first time in the world, which is expected to be directly applied to data centers, 5/6G signal processing, automatic driving, optical computing and other fields. It provides a new research paradigm and development direction for the next generation of on-chip optoelectronic information system.

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2. The birth of optical vortex rings
Based on Maxwell’s equations and optical conformal transformation, the nanophotonics team led by Zhan Qiwen of University of Shanghai for Science and Technology has fully derived and experimentally realized a beautiful optical vortex ring structure for the first time. This research work provides a new idea for the generation and characterization of three-dimensional complex space-time light fields, and will have important and far-reaching significance for theoretical research such as cyclic symmetry electrodynamics, cyclic symmetry plasma physics, optical symmetry and topology, quantum physics, astrophysics, as well as applied research such as optical sensing, light manipulation, optical information and energy transfer.

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3. 3D print nanocrystals with light
The research group of Sun Hongbo and Lin Linhan of the Department of Precision Instruments of Tsinghua University proposed for the first time that photogenerated high-energy carriers can be used to regulate the surface chemical activity of nanomaterials and achieve chemical bonding, thereby realizing the three-dimensional laser assembly of functional nanoparticles such as semiconductor quantum dots. This technology has the technical advantages of true three-dimensional, high purity, high resolution, and heterogeneous integration, opens up a new way of functional nanodevice preparation process, and has a wide range of application prospects in the fields of on-chip optoelectronic device integration and high-performance near-eye display.

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4. New technology realizes laser 3D printing nanoferroelectric domain for the first time
The research team led by Daniel Zhang Nanjing University has developed a non-reciprocal laser polarized ferroelectric domain technology: the femtosecond pulsed laser is focused on the lithium niobate crystal, forming an effective electric field inside the crystal, and realizing the controllable preparation of three-dimensional nano-ferroelectric domain. The processing accuracy reaches 30 nanometers, far beyond the diffraction limit, and can realize the correction and reconstruction of ferroelectric domain structure. This technology solves the problem that the traditional polarization process is limited to machining ferroelectric domain structures with micron precision in a two-dimensional plane, and provides new technical support for the development of three-dimensional integrated optoelectronic devices.

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5. Important research progress has been made in the field of high-purity ultra-integrated chiral light source
Based on the physical characteristics of the bound state in the continuous domain, Song Qinghai’s team from Harbin Institute of Technology (Shenzhen) realized chiral fluorescence to laser emission with high purity, high Q value and high directionality. Without the need for spin injection, it is possible to control the spectrum, far field, and spin angular momentum of spontaneous radiation and lasers. This approach is of great significance to improve the design of current chiral light sources and promote their application in photonic and quantum systems.

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6. The first round of experiments of Xihe Laser obtained a 60 MeV proton beam
Relying on the Shanghai ultra-strong ultrashort laser experimental device (Xihe Laser, SULF), the Laser Proton Acceleration Research Group of the State Key Laboratory of Intense Field Laser Physics of Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, used SULF-10PW laser to bombard the micron metal target in the first round of running-in experiments, and obtained a proton beam with a cut-off energy of 62.5 MeV under the acceleration mechanism of the normal sheath layer behind the target, which reached the domestic leading level and entered the international forefront. In the future, through further optimization, high-energy proton beams of 100 MeV will be obtained, and the application of laser proton sources in important fields such as fusion energy and tumor treatment will be effectively promoted.

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7. High efficiency, high repetition frequency pole ultra-fast ultrafast coherent light source
The research groups of Liu Feng, Chen Min and Li Boyuan of Shanghai Jiao Tong University successfully realized the active regulation of micron-scale pre-plasma by introducing circular polarization prepulse, constructed a suitable longitudinal density distribution, solved the problem that high-order harmonics are limited by laser contrast, and experimentally verified a new scheme for generating ultrafast ultraviolet radiation sources with high repetition frequency and high brightness.

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8. The luminescence lifetime of rare earth ions f-f transition is compressed to the nanosecond level
The teams of Zhang Zhenglong and Zheng Hairong, School of Physics and Information Technology, Shaanxi Normal University, have made breakthroughs in the field of nanooptics by relying on the self-built high-resolution in situ spectroscopy system. The plasmon inclined nano-optical cavity was used to compress the luminescence lifetime of rare earth ions f-f transition to less than 50 nanoseconds, and at the same time obtain a quantum yield enhancement of more than 1000 times. This achievement was evaluated by the reviewers as a “milestone” work in the field of rare earth luminescence, which is of great significance for expanding the application advantages of rare earth luminescence and promoting the development of quantum communication single-photon source and nanolaser.

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9. Quantum transcendence of laser interferometers
Zhang Weiping’s team and collaborators from the School of Physics and Astronomy of Shanghai Jiao Tong University and the Chengdao Li Institute have used their developed quantum-associative interferometry technology to skillfully combine with laser interferometer to realize a new quantum precision measurement technology that surpasses traditional laser interferometer. The new method integrates classical-quantum advantages, and in principle, it can be extended to large-scale precision measuring instruments such as LIGO gravitational wave detectors, realizing the upgrade of traditional interference technology, and taking an important step towards the development of quantum technology with real application value.

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10. Laser radiation that breaks through the fluorescence range
The team of Yu Haohai and Zhang Huaijin of Shandong University and the team of Chen Yanfeng of Nanjing University made a breakthrough in the field of laser physics, realizing laser radiation based on multiphonon coupling for the first time, and obtaining wide-band and tunable laser output in the range far beyond the fluorescence spectrum. The research results broaden the laser gain range and clarify the key functional primitives and sequence relationships in laser crystals, which is of great significance for the development of solid-state laser technology.

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Applied Research (10 items)
1. Integrated imaging chip to achieve aberration correction three-dimensional photography
The teams of Fang Lu and Dai Qionghai from the Imaging and Intelligent Technology Laboratory of Tsinghua University proposed a new architecture of digital adaptive optics under incoherent light, which decouples signal acquisition and aberration correction, and realizes high-speed large-scale block aberration removal for the first time. The integrated meta-imaging chip has been developed, which can realize high-resolution high-speed three-dimensional imaging with a large field of view for aberration correction, and increase the effective field diameter of traditional adaptive optics from 40 arcseconds to 1000 arcseconds, which can be widely used in astronomical observation, industrial detection, medical diagnosis and other fields.

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2. Fine manipulation of semiconductor nanocrystalline band structure in space-time
The team of Qiu Jianrong of Zhejiang University and the team of Tan Dezhi of Jiang Laboratory revealed a new law of spatial selective mesoscopic scale separation and ion exchange induced by femtosecond laser, realized the fine regulation of the distribution of elements in the glass microregion, developed a new technology for three-dimensional extreme manufacturing of femtosecond laser, constructed a three-dimensional luminescent wide-band continuously tunable nanocrystalline structure, and proposed and demonstrated for the first time that this three-dimensional micro-nanostructure can be used in ultra-large capacity and ultra-long-life information storage. Cutting-edge applications such as high-stability Micro-LED array and dynamic stereoscopic color holographic display.

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3. Planar wide-angle camera based on metalens integration
Li Tao’s team at Nanjing University has developed a planar wide-angle camera based on a metalens array, which realizes high-quality wide-angle imaging with a viewing angle of more than 120° with only a micron-thick nanostructure. This new principle of design successfully breaks through the size and weight limitations of traditional commercial fisheye lenses, demonstrating the great potential of metalens design in disruptive imaging technology.

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4. Optoelectronic integrated slight “compound eye camera” to solve the problem of incompatibility of commercial detectors
The cooperative team led by Zhang Yonglai of Jilin University manufactured three-dimensional bionic compound eyes with logarithmic contour small eyes through femtosecond laser micromachining technology, broke through the problem of three-dimensional compound eye non-planar imaging and commercial micro CCD/CMOS detector mismatch, developed a photoelectric integrated micro compound eye camera with a quality of only 230mg, and realized the three-dimensional reconstruction of the motion trajectory of microscopic targets with the help of multi-eye vision principle and neural network reconstruction algorithm. This achievement is of great significance in cutting-edge fields such as medical endoscopic imaging and micro-robot vision.

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5. A new record for optical fiber quantum key distribution – secure transmission without relay for more than 830 kilometers
The team of Guo Guangcan and Han Zhengfu of the University of Science and Technology of China broke through the limitation of signal-to-noise ratio by solving the problems of extremely weak light dual-field preparation and low-noise fast phase compensation, and created a world record of 830 km relayless optical fiber quantum communication. Compared with the work of other teams at home and abroad, this achievement not only increases the transmission distance without relay by more than 200 kilometers, but also increases the code rate by 50~1000 times, taking an important step towards realizing land-based quantum communication of thousands of kilometers.

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6. Optical frequency perfect abnormal reflector
Wang Zhanshan and Cheng Xinbin, School of Physical Science and Engineering, Tongji University, together with Zhou Lei of the Department of Physics of Fudan University, proposed a new quasi-three-dimensional sub-wavelength structure of one-dimensional multilayer film combined with two-dimensional metasurface, which enhances the regulation ability of non-local energy flow through the efficient coupling of transmission wave and Bloch wave, and achieves abnormal reflection of optical frequency with efficiency better than 99% for the first time. The research results are expected to promote the development of new beam scanning systems and other instruments and equipment.

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7. Ultra-long life perovskite LED
The team of David Di and Baodan Zhao of Zhejiang University used bipolar molecular stabilizers to inhibit ion migration and realized ultra-long-life perovskite LEDs that meet practical application standards for the first time. At optical power equivalent to high-brightness OLEDs, these NIR LEDs have a lifetime of 32,675 hours (3.7 years); at lower spoke brightness, their life expectancy is up to 270 years. These are record-breakingThe device operates continuously at a constant current of 5mA/cm2 for 5 months without significant attenuation of spoke brightness.

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8. The world’s first lithium niobate thin-film polarization multiplexed coherent optical modulator
Cai Xinlun’s research group of Sun Yat-sen University has realized the world’s first lithium niobate thin-film polarization multiplexed coherent optical modulator, which has a CMOS-compatible drive half-wave voltage and a modulation bandwidth of 110GHz, which is currently the world’s highest-performance ultra-low voltage and ultra-large bandwidth electro-optical modulator chip. Using this chip, the research team demonstrated the highest net rate of single-carrier coherent transmission currently available – 1.96Tb/s. This research has overcome electro-optical conversion devices that are indispensable for next-generation ultra-high-speed, low-power coherent optical transmission systems. The research on lithium niobate thin film materials and their photonic integration technology provides a strong guarantee for the independent and controllable realization of China’s optical communication industry chain.

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9. First discovery of the interfacial echo wall pattern in optical microcavities
Xiao Yunfeng’s team from the School of Physics of Peking University collaborated with Chen Youling from the Institute of Semiconductors of the Chinese Academy of Sciences to discover the interface echo wall pattern in optical microcavities for the first time. In the microfluidic integrated microbubble cavity, the researchers regulate the peak value of the electromagnetic field in the optical echo wall mode to the sensing surface, which physically improves the optical response strength of the sensor, and successfully realizes the microfluidic sensor device with single-molecule response, which has a wide application prospect in the field of high-sensitivity microdetection.

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10. Breakthrough research progress has been made in the application of optical coding liquid crystal superstructure
Zhu Weihong, Zheng Zhigang and Feringa cooperated with the School of Chemistry and Molecular Engineering, the School of Physics, and the Feringa Nobel Prize Scientists Joint Research Center of East China University of Science and Technology, focusing on the dynamic and controllable chiral liquid crystal optical microstructure, starting from material design, preparation and external field control of microstructure, to solve the problem of low optical efficiency of traditional liquid crystal system, empower the light control wide dynamic domain of liquid crystal microstructure, and develop multiple anti-counterfeiting new technologies that are reversible, erasable, gradual, structural superposition and embedding. It provides a technical solution for reference to solve the material bottleneck faced by China in the field of high-end anti-counterfeiting technology.

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“2022 China Optics Top Ten Progress” nomination award
Basic Research (10 items)
1. Microwave-optical coherent conversion with efficiency breaking through the quantum unclonable limit for the first time
The teams of Liao Kaiyu, Yan Hui and Zhu Shiliang of South China Normal University have made important research progress in the field of quantum networks: a microwave-optical wave coherent conversion scheme based on non-resonant six-wave mixing is theoretically proposed and experimentally realized, and the microwave-optical wave coherent conversion with an efficiency of more than 82% is realized by using cold atom ensembles, which lays the foundation for the practical application of the optical interface of superconducting quantum computers.

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2. For the first time, the shallow light lattice hertz narrow spectrum of strontium atoms under non-gravity pressure was realized
The Chang Hong team of the timing center of the Chinese Academy of Sciences and the teams of Wang Tao and Zhang Xuefeng of Chongqing University used Floquet technology to narrow the spectral lines of kHz to Hz level on the strontium atomic shallow lattice clock platform for the first time in the world. This experiment not only provides new ideas for quantum precision measurement, but also takes an important step towards spaceborne spaceborne light clocks.

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3. Optical Sigmin substructure in near-field optical vortex
The team of Yuan Xiaocong and Du Luping of Shenzhen University discovered and demonstrated the close relationship between optical spin topology and symmetry by studying optical spin-orbit coupling under rotational symmetry breaking, and revealed the new physics of spin topology photonics, which has great application prospects in optical displacement sensing, magnetic domain detection, quantum technology and other fields.

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4. Broadband terahertz pulsed coherent detection based on liquid water
The team of Zhang Liangliang of Capital Normal University, Zhao Yuejin of Beijing Institute of Technology, and Wang Weimin of Chinese University of China realized the coherent detection of broadband terahertz waves based on liquid water for the first time in the world, and obtained the time domain waveform of the terahertz electric field, and the spectral response reached 0.1~18THz, which can be extended to a wider range. This scheme breaks through the bottleneck of spectrum limitation in traditional solid-state detection, and the required laser energy is 2 orders of magnitude lower than that of gas detection, and the sensitivity is improved by one order of magnitude. Follow-up studies have confirmed that liquid detection can further improve the performance by changing the type of liquid, and provide a new technical approach for molecular dynamics research in bio-aqueous environment, which promotes the development of terahertz liquid photonics.

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5. Realize 46th-order nonlinear photon avalanche effect and super-resolution fluorescence imaging
The team of Zhan Qiuqiang of South China Normal University innovatively proposed a new mechanism of photon avalanche effect migration between different luminescent ions in terms of physical principles, and realized the ultra-high-order nonlinear fluorescence effect of 46th order under nanoscale and room temperature conditions based on low-power continuous laser excitation. Based on this effect, a far-field optical resolution of λ/14 is achieved by using a single continuous laser in optical applications, with only 300 microwatts of power, and the system conditions are simpler than traditional confocal conditions, and subcellular super-resolution biological imaging is further realized. This achievement breaks the optical diffraction limit by pure physical method, provides a simple method for super-resolution microscopy imaging, and has broad application space in other fields such as lithography, optical storage, and light sensing that also need to overcome the diffraction limit.

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6. Large-area, high-throughput robust unidirectional body transmission
Li Zhiyuan’s team of South China University of Technology proposed a heterogeneous Haldane model that predicts the existence of unidirectional posture in electronic systems, which can realize high-throughput energy transport. They further extended the model to the field of photonics, realizing long-distance, large-area, high-throughput, and robust, one-way bulk transmission of electromagnetic waves in heteromagnetized compact two-dimensional honeycomb lattice magneto-optical photonic crystals. This research work expands people’s understanding of topological phases, enriches the means of topological state regulation, and provides new ideas for the development of high-throughput and robust energy transport materials and structures.

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7. Carrier-free light-emitting device based on interdigital electrode structure
Ning Cunzheng’s team from Tsinghua University broke through the traditional semiconductor optoelectronic device design framework and made full use of the advantages of large binding energy of two-dimensional semiconductor excitons, and proposed a two-dimensional semiconductor light-emitting device based on the structure of interdigital electrodes. The device does not require direct contact between the electrode and the two-dimensional semiconductor and inject carriers, does not need to doping the two-dimensional semiconductor or make a PN junction, but accelerates the existing carriers in the material through an electric field, so that it collides with the semiconductor valence band electrons, produces excitons and emits light. This structure can use fragmented two-dimensional semiconductors to fabricate large-size and multi-wavelength light-emitting devices.

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8. Thermal activation delayed fluorescence luminescence mechanism is used to achieve efficient X-ray scintillation and imaging
Yang Yang of Zhejiang University and collaborators explored the physical mechanism of excited state of X-ray excited material molecules, and unlike ultraviolet-visible excitation, the team found that X-ray photons excite a large number of trilinear dark excitons, and proposed a quantitative method to measure the proportion of single and three-wire state generation. Based on this physical image, the team draws on the knowledge in the field of organic luminescence display and proposes for the first time a new mechanism of three-line dark excitons under X-ray excitation using heat-activated delayed fluorescence efficiently and at high speed, which provides a new scientific basis for X-ray imaging applications.

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9. Discover the novel phenomenon of optical spin-orbit mapping
The team of Wang Jian of Huazhong University of Science and Technology discovered a new phenomenon of optical spin-orbit mapping caused by the eigenmode dedeconsolidation characteristics of optical fibers in isotropic optical fiber waveguide media. This discovery enriches the connotation of spin-orbit interaction of light, provides a new control means for the spin and orbital degrees of freedom of light, and is expected to be applied to optical communication, photometrology and quantum optics.

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10. New progress has been made in the research of femtosecond laser direct writing three-dimensional inorganic nanostructures
Jin Feng, Zheng Meiling, Institute of Physical and Chemical Technology, Chinese Academy of Sciences, and Duan Xuanming of Jinan University have made new progress in femtosecond laser three-dimensional inorganic nanostructure processing. The research team used the ultrafast laser multiphoton effect to realize inorganic photoresist superdiffraction nanolithography, and obtained 3D inorganic microstructures and devices with 26nm characteristic size of one-thirtieth laser wavelength and excellent high temperature resistance and solvent resistance, which provided a new method for the development of new 3D inorganic nanostructures and devices.

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Applied Research (10 items)
1. Realize high-dimensional quantum computing chips
The team and collaborators of Wang Jianwei of Peking University realized a programmable high-dimensional quantum processor based on large-scale silicon-based integrated optical quantum chips, realized the initialization, operation and measurement of high-dimensional single qubits and double qubits, provided a top-down, from algorithm to quantum gate operation, from top-level requirements to low-level physical implementation of high-dimensional quantum computing architecture, through programming to reconstruct the processor more than one million times, realized a series of high-fidelity quantum logic gate operations, and executed a variety of important high-dimensional quantum Fourier transform algorithms , to achieve the principle verification of high-dimensional quantum computing.

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2. Metasurface real-time hyperspectral imaging chip
Cui Kaiyu of Tsinghua University and others successfully developed the world’s first real-time hyperspectral imaging chip, which can obtain hyperspectral information of 150,000 pixels at a time, and successfully use this chip to successfully obtain the dynamic changes of the characteristic spectrum of hemoglobin and its derivatives in the brain of living rats. Compared with the existing on-chip spectral detection technology, this achievement has achieved a leap from single-point micro-spectrometer to real-time hyperspectral imaging chip, which can create a new dimension of material analysis for imaging technology, and has the advantages of high precision, chip-based and mass production, and is expected to become a disruptive technology for the next generation of imaging chips.

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3. Calculate the general algorithm of super-resolution image reconstruction to stably improve the resolution of fluorescence microscopy by twofold
Chen Liangyi of Peking University and the team of Li Haoyu of Harbin Institute of Technology invented the sparse deconvolution algorithm by proposing the general prior knowledge that “increasing the resolution of fluorescence images is equivalent to increasing the relative sparsity of images”, breaking through the optical hardware limitations of existing microscopic systems, and realizing general-purpose computational fluorescence super-resolution imaging for the first time. Combined with the self-developed structured light system, it realizes the fastest (564Hz) and the longest imaging time (more than 1 hour) super-resolution imaging with the highest spatial resolution (60nm) in live-cell imaging.

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4. High-power all-fiber green lasers are moving towards practical use
Luo Zhengqian’s team from Xiamen University cooperated with Huawei to propose a green laser directly generated by the downconversion of praseodymium-doped double-clad fiber, developed visible fiber end-face dielectric film technology to build an all-fiber green resonator, and obtained a 521nm output power of 3.6W green laser, realizing a breakthrough in miniaturized all-fiber high-power green laser.

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5. New imaging technology: or a powerful tool for non-invasive imaging of living brains
The team of Jianan Qu at the Hong Kong University of Science and Technology has studied a novel in vivo adaptive optics three-photon microscopy imaging (AO-3PM) system that combines adaptive optics and three-photon imaging techniques to perform high-resolution, large-field imaging deep in the brain through the complete skull of living mice. This technique greatly improves the image quality of non-invasive in vivo imaging, providing a powerful tool for studying brain structure and function.

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6. The new lidar explores cloud-aerosol interactions
The Liu Dong team and collaborators of Zhejiang University provided a new and effective solution for this – developed a dual-field high-spectral resolution lidar, separated Rayleigh scattering and meter scattering by ultra-fine spectral frequency evaluation, greatly simplified the characterization of multiple scattering effects by using quasi-single scattering approximation, and obtained high-precision inversion by cleverly designing the sensitivity of inversion parameters to the difference in field angle, and finally realized the all-day high-precision synchronous detection of water cloud and aerosol optical and microphysical profile for the first time. The nature of cloud-aerosol interaction phenomena can be further studied and understood.

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7. Multi-stage diffractive light sheet imaging technology realizes 3D dynamic super-resolution observation of living cells
The teams of Fei Peng and Zhang Yuhui of Huazhong University of Science and Technology proposed multi-level diffraction regulated light sheet microscopy and brain-like hierarchical perception AI super-resolution algorithm, which pushed the spatial resolution of three-dimensional super-resolution imaging of living cells to 100 nm of isotropy while achieving high temporal resolution of 17Hz per volume, observed the fine interaction of multiple organelles in 4D space-time for the first time, and quantitatively revealed the regulatory mode of endoplasmic reticulum and Drp1 protein oligomer-mediated mitochondrial division. The paper was published in Nature Methods in March 2022.

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8. High-performance, low-cost colloidal quantum dot short-wave infrared imaging chip
In the past four years, the teams of Gao Liang and Tang Jiang of Huazhong University of Science and Technology have carried out research on CQD infrared detection chips, and adopted new strategies for liquid phase passivation, designed and prepared new top-incident devices, and developed silicon-based integrated integration processes in view of bottlenecks such as CQD defects, incompatible device structures, and immature integration processes. Together with Huawei, Huawei has developed the first CQD short-wave infrared imaging chip in China, with an array size of 640×512 and an infrared peak external quantum efficiency of 63%, which is internationally leading in external quantum efficiency compared with similar CQD chips.

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9. Topological cavity surface emitting laser
Lu Ling’s team from the Institute of Physics of the Chinese Academy of Sciences proposed a new Dirac vortex topological cavity, which can break through the existing bottleneck in principle and improve the exit power and beam quality at the same time. Recently, the team developed a topological cavity surface emitting laser based on the topological optical cavity. At 1550nm, 10W peak power, far-field divergence angle of less than 1°, 60dB side-mode rejection ratio, and two-dimensional multi-wavelength array integration capability of a single device are simultaneously realized. The invention of topological cavity surface emitting laser is an exploration of the export of topological physics applications, which is of great significance for emerging technologies such as face recognition, automatic driving, and lidar.

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10. Realize ultra-high resolution QLED with high performance
Li Fushan et al. of Fuzhou University innovatively used ordered molecular self-assembly technology to achieve dense and defectless quantum dot monolayer film, and combined with transfer printing technology to achieve ultra-high resolution quantum dot display (~25000PPI) of submicron-level pixels. For the first time, a non-luminescent charge barrier layer embedded in a honeycomb pattern between the light-emitting pixels is proposed, which effectively reduces the leakage current of the device and greatly improves the device efficiency. This achievement opens up a whole new route for the realization of ultra-high-resolution light-emitting displays with high performance.

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The winners of “2022 China Optics Top Ten Progress” are subject to the website link.
https://www.opticsjournal.net/CL/ZGGX?type=view&postid=PT230420000003jGmJp
The list of winners of the “2022 China Optics Top Ten Progress” nomination award is subject to the website link.
https://www.opticsjournal.net/CL/ZGGX?type=view&postid=PT2304200000062Y5b8
 
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