10 cutting-edge developments including "New silicon-based optoelectronic on-chip integrated system driven by microcavity optical comb" were selected as "2022 Top Ten Advances in China's Optics" (basic research category); 10 items including "Integrated imaging chip realizes aberration-corrected 3D photography" The progress was selected as "2022 Top Ten Advances in Chinese Optics" (applied research category).
Research achievements such as "60 MeV proton beam obtained in the first round of Xihe laser experiment", "quantum transcendence of laser interferometer", "new record of optical fiber quantum key distribution" and other research achievements were selected as "2022 Top Ten Advances in Chinese Optics" in the category of basic research and applied research .
On the morning of April 20th, the 2023 China Optics Ten Progress Summit Forum opened in Fuyang District, Hangzhou City, Zhejiang Province. On the evening of the 20th, the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences and the China Laser Magazine under the Chinese Optical Society released the "2022 Top Ten Advances in Chinese Optics" and held an award ceremony.
The forum carried out exchanges and discussions on six major topics, including optical physics, optical materials and structures, light sources, optical technology, applied optics, and interdisciplinary fields of photonics.
Cui Tiejun, chairman of the forum, academician of the Chinese Academy of Sciences, and professor of Southeast University, said in his speech that over the years, it has been a difficult problem to objectively evaluate the output of optical researchers.
After multiple rounds of selection by the review committee, 10 cutting-edge developments such as "New silicon-based optoelectronics-on-chip integrated system driven by microcavity optical comb" were selected as "2022 Top Ten Advances in China's Optics" (basic research category); "Integrated imaging chip realizes aberration 10 advances including "Correcting 3D Photography" were selected as "2022 Top Ten Advances in Chinese Optics" (applied research category).
The selected results are as follows:
Basic research (10 items)
1. Novel silicon-based optoelectronic integrated system on chip driven by microcavity optical comb
The team of Wang Xingjun, a professor at the School of Electronics, Peking University, and John E. Bowers, a professor at the Department of Materials, Electrical and Computer Engineering at the University of California, Santa Barbara, worked together to solve the problem of simple and robust excitation of microcavity optical combs. Long-term stability, silicon-based system design for optical comb light sources, and reconfigurable multi-dimensional spectral shaping technology on silicon substrates. For the first time in the world, a new silicon-based optoelectronic system-on-chip driven by Kerr microcavity optical combs has been realized. It is directly applied to data centers, 5/6G signal processing, autonomous driving, optical computing and other fields, providing a new research paradigm and development direction for the next generation of on-chip optoelectronic information systems.
2. Birth of the optical vortex ring
Based on Maxwell's equations and optical conformal transformation, the nanophotonics team led by Zhan Qiwen, a professor at the School of Optoelectronic Information and Computer Engineering, University of Shanghai for Science and Technology, for the first time theoretically and experimentally realized a beautiful optical vortex ring structure. This research work provides a new idea for the generation and characterization of three-dimensional complex space-time light fields. , light manipulation, light information and energy transfer and other applied research will have important and far-reaching significance.
3. 3D printing nanocrystals with light
The research group of Professor Sun Hongbo and Associate Professor Lin Linhan from the Department of Precision Instruments of Tsinghua University proposed for the first time the use of photogenerated high-energy carriers to regulate the surface chemical activity of nanomaterials and achieve chemical bonding, thus 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 heterogeneous integration. It has opened up a new way for the preparation of functional nano-devices, and has a wide range of applications in the fields of on-chip optoelectronic device integration and high-performance near-eye display. prospect.
4. New technology realizes laser 3D printing nano ferroelectric domain for the first time
A research team led by Zhang Yong, a professor at the School of Modern Engineering and Applied Sciences of Nanjing University, has developed a non-reciprocal laser-polarized ferroelectric domain technology: focusing a femtosecond pulse laser on a lithium niobate crystal, forming an effective electric field, enabling the controllable preparation of three-dimensional nanoferroelectric domains. The processing accuracy has reached 30 nanometers, far breaking through the diffraction limit, and can realize the correction and reconstruction of the ferroelectric domain structure. This technology solves the problem that the traditional polarization process is limited to processing 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.
5. Significant research progress has been made in the field of high-purity ultra-integrated chiral light sources
The team of Professor Song Qinghai from Harbin Institute of Technology (Shenzhen) realized the emission of chiral fluorescence to laser with high purity, high Q value and high directionality based on the physical characteristics of the bound state itself in the continuum domain. Controlling the spectrum, far-field, and spin angular momentum of spontaneous emission and lasing can be achieved without spin injection. This method is of great significance for improving the design of current chiral light sources and promoting their applications in photonic and quantum systems.
6. The first round experiment of Xihe Laser obtained 60MeV proton beam
The research team led by Zhang Hui, an associate researcher at the State Key Laboratory of Strong-field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, relied on the Shanghai Ultra-Intensive and Ultra-short Laser Experimental Facility (Xihe Laser, SULF), and used SULF in the first round of running-in experiments. -10PW laser bombards the micron metal target, and obtains a proton beam with a cut-off energy of 62.5MeV under the acceleration mechanism of the normal sheath behind the target. This result has reached the domestic leading level and entered the international forefront. In the future, through further optimization, high-energy proton beams at the level 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.
7. Efficient, high repetition frequency extreme ultraviolet ultrafast coherent light source
The research group of Associate Researcher Liu Feng, Professor Chen Min, and Associate Researcher Li Boyuan from the School of Physics and Astronomy of Shanghai Jiaotong University successfully realized the active regulation of the micron-scale pre-plasma by introducing circularly polarized pre-pulses, and constructed a suitable longitudinal density distribution to solve the problem of The generation of higher harmonics is limited by the problem of laser contrast. Experiments have verified a new scheme for generating high-repetition frequency, high-brightness extreme ultraviolet ultrafast radiation sources.
8. Rare earth ion ff transition luminescence lifetime is compressed to nanosecond level
The team of Professor Zhang Zhenglong and Professor Zheng Hairong from the School of Physics and Information Technology of Shaanxi Normal University has made breakthroughs in the field of nano-optics relying on the self-built high-resolution in-situ spectroscopy system. Using plasmons to tilt the nano-optical cavity, the luminescence lifetime of the ff transition of rare earth ions is compressed to less than 50 nanoseconds, and the quantum yield enhancement of more than 1000 times is obtained at the same time. 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 sources and nanolasers.
9. Quantum transcendence of laser interferometer
Professor Zhang Weiping's team and collaborators from the School of Physics and Astronomy of Shanghai Jiaotong University and the Li Zhengdao Research Institute have used their developed quantum correlation interference technology and laser interferometer to ingeniously combine to realize a new quantum precision measurement technology that surpasses traditional laser interferometers. The new method combines the advantages of classical and quantum. In principle, it can be extended to large-scale precision measuring instruments such as LIGO gravitational wave detectors. It realizes the upgrade of traditional interference technology and takes an important step towards the development of quantum technology with real application value. .
10. Laser radiation that breaks through the fluorescence range
The team of Professor Yu Haohai and Professor Zhang Huaijin from the School of Physics of Shandong University and the team of Professor Chen Yanfeng from the School of Modern Engineering and Applied Sciences of Nanjing University have made breakthroughs in the field of laser physics. A wide-band, tunable laser output is obtained in a wide range. The research results have broadened the range of laser gain and clarified the key functional units and ordering relationships in laser crystals, which are of great significance to the development of solid-state laser technology.
Applied Research (10 items)
1. Integrated imaging chip realizes aberration-corrected 3D photography
Fang Lu, an associate professor of the Department of Electronic Engineering of Tsinghua University, and Dai Qionghai, an academician of the Chinese Academy of Engineering and a professor of Tsinghua University, proposed a new digital adaptive optics architecture under incoherent light, decoupling signal acquisition and aberration correction, and realizing high-speed and large-scale block imaging for the first time. Poor removal. An integrated meta-imaging chip has been developed, which can realize aberration-corrected large-field-of-view high-resolution and high-speed 3D imaging, and increases the effective field diameter of traditional adaptive optics from 40 arcseconds to 1000 arcseconds, which can be widely used in Astronomical observation, industrial testing, medical diagnosis and other fields.
2. Precise manipulation of the energy band structure of semiconductor nanocrystals in the space-time domain
The team of Professor Qiu Jianrong from the School of Optoelectronic Science and Engineering of Zhejiang University and the team of Tan Dezhi, a research expert at the Photoelectric Intelligent Computing Research Center of Zhijiang Laboratory, revealed a new law of femtosecond laser-induced space-selective mesoscale phase separation and ion exchange. The fine control of element distribution in the micro-area has opened up a new technology for femtosecond laser three-dimensional extreme manufacturing, and constructed a three-dimensional light-emitting wide-band continuously tunable nanocrystalline structure. , high stability Micro-LED array and dynamic three-dimensional color holographic display and other cutting-edge applications.
3. Planar wide-angle camera integrated based on metalens
The team of Li Tao, a professor at the School of Modern Engineering and Applied Science of Nanjing University, has developed a planar wide-angle camera based on a meta-lens array, which achieves high-quality wide-angle imaging with a viewing angle of more than 120° with only one micron thick nanostructure. The design principle of this new principle successfully breaks through the volume and weight limitations of traditional commercial fisheye lenses, demonstrating the huge application potential of metalens design in disruptive imaging technology.
4. Optoelectronics integrates a slight "compound eye camera" to solve the problem of incompatibility of commercial detectors
The cooperative team led by Professor Zhang Yonglai from the School of Electronic Science and Engineering of Jilin University used femtosecond laser micromachining technology to manufacture a 3D bionic compound eye with logarithmic contour ommatidia, which broke through the non-planar imaging of 3D compound eyes and the mismatch of commercial micro CCD/CMOS detectors. problem. A photoelectric integrated miniature compound eye camera with a mass of only 230 mg has been developed. With the help of multi-eye vision principles and neural network reconstruction algorithms, the three-dimensional reconstruction of the trajectory of microscopic targets has been realized. This achievement is of great significance in frontier fields such as medical endoscopic imaging and micro-robot vision.
5. A new record for optical fiber quantum key distribution - over 830 kilometers of secure transmission without relay
Guo Guangcan, a professor of the Department of Optics and Optical Engineering of the University of Science and Technology of China, an academician of the Chinese Academy of Sciences, and Han Zhengfu, a professor of the Department of Optics and Optical Engineering of the University of Science and Technology of China, broke through the limitation of the signal-to-noise ratio by solving the problems of extremely weak light double-field preparation and low-noise fast phase compensation. , creating a world record for 830 kilometers of unrepeated optical fiber quantum communication. Compared with the work of other teams at home and abroad, this achievement not only increases the non-relay transmission distance by more than 200 kilometers, but also increases the coding rate by 50 to 1000 times, which is an important step towards the realization of thousand kilometers of land-based quantum communication.
6. Optical frequency perfect anomalous reflector
Professor Wang Zhanshan and Professor Cheng Xinbin from the School of Physical Science and Engineering of Tongji University, together with Professor Zhou Lei from the Department of Physics of Fudan University, proposed a new quasi-three-dimensional sub-wavelength structure of a one-dimensional multilayer film combined with a two-dimensional metasurface. High-efficiency coupling enhances the ability to regulate non-local energy flow, and for the first time realizes anomalous reflection of optical frequency with an efficiency better than 99%. The research results are expected to promote the development of new beam scanning systems and other instruments and equipment.
7. Ultra-long life perovskite LED
The team of tenured professor David Di and Zhao Baodan from the School of Optoelectronic Science and Engineering of Zhejiang University used a bipolar molecular stabilizer to suppress ion migration, and for the first time realized an ultra-long-life perovskite LED that meets practical application standards. These near-infrared LEDs have a lifetime of 32,675 hours (3.7 years) at light power equivalent to high-brightness OLEDs; at lower radiances, they are expected to last up to 270 years. These record-setting devices were operated at a constant current of 5 mA/cm² for 5 months without appreciable decay in radiance.
8. The world's first lithium niobate thin film polarization multiplexing coherent optical modulator
The research group of Professor Cai Xinlun from the School of Electronics and Information Engineering (School of Microelectronics) of Sun Yat-sen University realized the world's first lithium niobate thin film polarization multiplexing coherent optical modulator. It is currently the world's highest-performance electro-optic modulator chip with ultra-low voltage and ultra-large bandwidth. Using this chip, the research team demonstrated the highest net rate of single-carrier coherent transmission—1.96Tb/s. This research addresses electro-optical conversion devices that are indispensable in next-generation ultra-high-speed, low-power coherent optical transmission systems. The research on lithium niobate thin film materials and its photonic integration technology provides a strong guarantee for realizing the independent control of my country's optical communication industry chain.
9. Discovered the interface whispering gallery mode in the optical microcavity for the first time
The team of Professor Xiao Yunfeng from the School of Physics of Peking University, in cooperation with Associate Researcher Chen Youling from the Institute of Semiconductors, Chinese Academy of Sciences, discovered the interface whispering gallery mode in an optical microcavity for the first time. In the microfluidic integrated microbubble cavity, the researchers adjusted the peak electromagnetic field of the optical whispering gallery mode to the sensing surface, which physically improved the optical response intensity of the sensor, and successfully realized a microfluidic sensor device with single-molecule response. It has broad application prospects in the field of high-sensitivity trace detection.
10. Breakthrough research progress in the application of optically encoded liquid crystal superstructures
Zhu Weihong, professor of East China University of Science and Technology, dean of the School of Chemistry and Molecular Engineering, Zheng Zhigang, professor of the School of Physics, and Bernard L. Feringa), around the dynamic controllable chiral liquid crystal optical microstructure, starting from material design, preparation and external field control of the microstructure, to solve the problem of low light efficiency of the traditional liquid crystal system, and to empower the optical control wide dynamic domain of the liquid crystal microstructure, The development of reversible, erasable, gradient, structural superposition and embedded multiple anti-counterfeiting new technologies provides a technical solution for reference to solve the material bottleneck faced by my country in the field of high-end anti-counterfeiting technology.