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Chinese Physics Letters 2009年第8期26卷 132-135页

作者：王河林冷雨欣徐至展祁义红胡明列王清月 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 Ultrafast laser Laboratory Key Laboratory of Optoelectronic Information and Technical Science College of Precision Instrument and Optoelectronic Engineering Tianjin University Tianjin 300072

Using the tunable pump pulses with about lOO fs pulse duration and 1064 nm central wavelength; the polarization-, wavelength- and power-dependent anti-Stokes lines are generated and modulated simultaneously in a polarization-maintaining photonie crystal fiber （PM-PCF） with two zero-dispersion wavelengths. By accurately controlling the polarization directions, the wavelength and the power of the pump pulse in the fiber anomalous region close to the second zero-dispersion wavelength of the PM-PCF, the output anti-Stokes pulse spectra can be tuned between 563 nm and 603 nm, which is in good agreement with the theoretical simulation. The color conversion of the mode image from yellow to orange is also observed with the different polarization pump pulses. These results can be attributed to the combined interaction between the fiber birefringence （including linear- and nonlinear- birefringence） and dispersion, and are attributed to phase-matching parametric four-wave mixing.

关键词：

Application of Photonic Crystals in Semiconductor Lasers

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光机电信息 2007年第5期24卷 31-32,37-40页

作者： LIU Guang-yu ZHANG Yan PENG Biao SUN Yan-fang LI Te CUI Jin-jiang NING Yong-qiang QIN Li LIU Yun WANG Li-jun Graduate School of the Chinese Academy of Science Beijing 100039 China Lab of Excited States Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of SciencesChangchun 130033China

Photonic crystals(PCs) have attracted much considerable research attention in the past two decades. They are artificially fabricated periodic dielectric structures. The periodic dielectric structures have photonic band gap(PBG) and are referred to as photonic band gap materials. This paper mainly introduces one-dimensional (1-D) and 2D PCs applied in the semiconductor lasers.

关键词：光子晶体半导体激光器应用周期性介电结构

Space-selective Precipitation and Dissolution of Ag and Au Nanoparticles in Silicate Glasses by Femtosecond Laser Irradiation

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Journal of Wuhan University of Technology(Materials Science) 2007年第B12期22卷 790-793页

作者：胡晓邱建荣 Shanghai institute of optics and Fine Mechanics Chinese Academy of Science Graduate School of the Chinese Academy of Science Beijing 100039China Department of Material Science and Engineering Zhejiang University

In Ag^＋ and Au^3＋ co-doped silicate glass sample, we realized controllable precipitation and dissolution of Ag and Au nanoparticles. A new method was proposed for separate precipitation of Ag and Au nanoparticles in different areas of the same sample through femtosecond laser irradiation and further annealing; different colors were obtained in the same glass. We also studied the laser dissolution of Ag and Au nanoparticles in the Ag^＋ and Au^3＋co-doped silicate glass. The mechanism of the phenomena we observed was discussed briefly.

关键词： femtosecond laser Ag^+ and Au^3+ nanopaticle silicate glass

A vectorial model for the nonlinear gradient force exerted on metallic Rayleigh nanoparticles

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Chinese optics Letters 2024年第2期22卷 207-213页

作者：朱政张聿全闵长俊 Aurèle J.LAdam H.Paul Urbach 袁小聪 Research Center for Humanoid Sensing Research Institute of Intelligent SensingZhejiang LabHangzhou 311100China Nanophotonics Research Center Institute of Microscale Optoelectronics&State Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060China optics Research Group ImPhys DepartmentFaculty of Applied SciencesDelft University of TechnologyDelft 2628 CJThe Netherlands

Optical tweezers have proved to be a powerful tool with a wide range of *** gradient force plays a vital role in the stable optical trapping of *** scalar method is convenient and effective for analyzing the gradient force in traditional optical ***,when the third-order nonlinear effect of the nano-object is stimulated,the scalar method cannot adequately present the optical response of the metal nanoparticle to the external optical ***,we propose a theoretical model to interpret the nonlinear gradient force using the vector *** combining the optical Kerr effect,the polarizability vector of the metallic nanoparticle is derived.A quantitative analysis is obtained for the gradient force as well as for the optical potential *** vector method yields better agreement with reported experimental *** suggest that this method could lead to a deeper understanding of the physics relevant to nonlinear optical trapping and binding phenomena.

关键词： gradient forces nonlinear effect metallic nanoparticles

Theoretical study on residual infrared absorption of Ti:sapphire laser crystals

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Photonics Research 2021年第6期9卷 909-915页

作者： QIAORUI GONG CHENGCHUN ZHAO YILUN YANG QIANNAN FANG SHANMING LI MIN XU YIN HANG Laboratory of Micro-Nano Optoelectronic Materials and Devices Key Laboratory of High-Power Laser MaterialsShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Residual infrared absorption is a key problem affecting the laser emission efficiency of Ti:sapphire *** this paper,the origin of residual infrared absorption of Ti:sapphire crystal is systematically studied by using the first principles *** to the contact conditions of O octahedron in the crystal structure of Al_(2)O_(3),four Ti^(3+)−Ti^(3+)ion pair models and three Ti^(4+)−Ti^(3+)ion pair models were defined and *** what we believe is the first time,the near-infrared absorption spectra consistent with the experimental results were obtained in specific theoretical *** electronic structures,absorption spectra,and charge distributions calculated show that the line-contact Ti^(3+)−Ti^(3+)ion pair with antiferromagnetic coupling and the facecontact Ti^(4+)−Ti^(3+)ion pair are two main contributors to the residual infrared absorption of Ti:sapphire,while some other ion pair models provide a basis to explain more complex residual infrared absorption.

关键词： Ti:sapphire laser absorption

Digital spiral object identification using random light

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Light(Science & Applications) 2017年第1期6卷 708-712页

作者： Zhe Yang Omar S Magaña-Loaiza Mohammad Mirhosseini Yiyu Zhou Boshen Gao Lu Gao Seyed Mohammad Hashemi Rafsanjani Gui-Lu Long Robert W Boyd State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China The institute of optics University of RochesterRochesterNew York 14627USA School of Science China University of GeosciencesBeijing 100083China Tsinghua National Laboratory for Information Science and Technology Beijing 100084China Department of Physics University of OttawaOttawa ON K1N 6N5OntarioCanada

Photons that are entangled or correlated in orbital angular momentum have been extensively used for remote sensing,object identification and *** has recently been demonstrated that intensity fluctuations give rise to the formation of correlations in the orbital angular momentum components and angular positions of random *** we demonstrate that the spatial signatures and phase information of an object with rotational symmetries can be identified using classical orbital angular momentum correlations in random *** Fourier components imprinted in the digital spiral spectrum of the object,as measured through intensity correlations,unveil its spatial and phase *** similarities with conventional compressive sensing protocols that exploit sparsity to reduce the number of measurements required to reconstruct a signal,our technique allows sensing of an object with fewer measurements than other schemes that use pixel-by-pixel *** remarkable advantage of our technique is that it does not require the preparation of fragile quantum states of light and operates at both low-and high-light *** addition,our technique is robust against environmental noise,a fundamental feature of any realistic scheme for remote sensing.

关键词： object identification orbital angular momentum random light remote sensing second-order correlation

Exploitation of geometric and propagation phases for spin-dependent rational-multiple complete phase modulation using dielectric metasurfaces

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Photonics Research 2022年第4期10卷 877-885页

作者： Ata Ur Rahman Khalid Fu FENG Naeem Ullah Xiaocong Yuan Michael Geoffrey Somekh Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Beijing Engineering Research Center for Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Faculty of Engineering University of NottinghamNottingham NG72RDUK

Metasurfaces have drawn considerable attention in manipulation of electromagnetic waves due to their exotic subwavelength footprints. Regardless of immense progress of polarization-dependent flat optics, the realization of on-device switchable complete phase multiplication is still missing from design multifunctional devices. Here,by combining geometric and propagation phases, a generalized design principle is proposed that can achieve switchable integer or fractional multiple complete phase modulation in transmitted circularly cross-polarized light by switching the handedness of incident polarization. As a proof of concept, two types of spin-dependent bifunctional wavefront manipulating devices, including switchable beam splitter/beam deflector and spinto-orbital angular momentum converter designs are numerically realized. It is believed that the proposed single-cell spin-switchable rational-multiple complete-phase-modulation design principle based on combined propagation and geometric phases has great potential to underpin the development of meta-optics-based multifunctional operations in the field of integrated optics, imaging, and optical communication.

关键词： polarization phase rational

Broadband THz Sources from Gases to Liquids

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Ultrafast Science 2021年第1期1卷 80-96页

作者： Yiwen E Liangliang Zhang Anton Tcypkin Sergey Kozlov Cunlin Zhang X.-C.Zhang The institute of optics University of RochesterNY 14627USA Department of Physics Capital Normal UniversityBeijing 100048China ITMO University St.Petersburg 199034Russia

Matters are generally classified within four states:solid,liquid,gas,and *** of the four states of matter(solid,gas,and plasma)have been used for THz wave generation with short laser pulse excitation for decades,including the recent vigorous development of THz photonics in gases(air plasma).However,the demonstration of THz generation from liquids was conspicuously *** is well known that water,the most common liquid,is a strong absorber in the far infrared ***,liquid water has historically been sworn off as a source for THz ***,broadband THz wave generation from a flowing liquid target has been experimentally demonstrated through laser-induced *** liquid target as the THz source presents unique ***,liquids have the comparable material density to that of solids,meaning that laser pulses over a certain area will interact with three orders more molecules than an equivalent cross-section of *** contrast with solid targets,the fluidity of liquid allows every laser pulse to interact with a fresh area on the target,meaning that material damage or degradation is not an issue with the high-repetition rate intense laser *** make liquids very promising candidates for the investigation of high-energy-density plasma,as well as the possibility of being the next generation of THz sources.

关键词： absorber repetition intense

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钙钛矿太阳能电池的发展现状和未来趋势

Engineering 2023年第2期21卷 15-19页

作者：胡浙鲁冉晨鑫张辉晁凌锋陈永华黄维 Key Laboratory of Flexible Electronics(KLOFE)&institute of Advanced Materials(IAM) School of Flexible Electronics(Future Technologies)Nanjing Tech UniversityNanjing 211816China Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China optics Valley Laboratory Wuhan 430074China

*** Carbon neutrality is an important strategy to address the acute problems of resource and environmental ***,afforestation,energy conservation,emissions reduction,and other measures have been adopted to offset the total amount of carbon dioxide and other greenhouse gas emissions generated by countries,businesses,products,activities,or individuals,with the aim of finally achieving zero net emissions(Fig.1(a)).

关键词：钙钛矿太阳能电池现状和未来 finally

Demonstration of X-ray Thomson Scattering on Shenguang-Ⅱ Laser Facility

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Plasma Science and Technology 2012年第10期14卷 864-870页

作者：胡广月张小丁郑坚雷安乐沈百飞徐至展张继彦杨家敏杨国洪韦敏习李军丁永坤 CAS Key Laboratory of Basic Plasma Physics&Department of Modern Physics University of Science and Technology of China State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Research Center of Laser Fusion China Academy of Engineering Physics

X-ray Thomson scattering technique for diagnosing dense plasma was demonstrated on Shenguang-Ⅱ laser facility. Laser plasma x-ray source of titanium He-a lines （-4.75 keV）, generated by laser beam （1.5 kJ/527 nm/2 ns） heated titanium thin foil, was used as x-ray probe beam. The x-ray probe was then scattered by cold CH foam column of 1 g/cm^3 density. The scattered radiation at 90° was diffracted by polyethylene terephthalate （PET） crystal and recorded on x-ray charge-coupled device. Well-defined scattering spectra were obtained with good signal to noise ratio.

关键词： Thomson scattering x-rays strongly-coupled plasma