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Experimental studies of extraordinary light transmission through periodic arrays of subwavelength square and rectangular holes in metal films

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Chinese physics B 2010年第4期19卷 413-417页

作者：华一磊傅晋欣李江艳李志远杨海方 laboratory of optical physics Institute of PhysicsChinese Academy of Sciences laboratory of Microfabrication Institute of PhysicsChinese Academy of Sciences

We fabricate a series of periodic arrays of subwavelength square and rectangular air holes on gold films, and measure the transmission spectra of these metallic nanostructures. By changing some geometrical and physical parameters, such as array period, air hole size and shape, and the incident light polarization, we verify that both global surface plasmon resonance and localized waveguide mode resonance are influential on enhancing the transmission of light through nanostructured metal films. These two resonances induce different behaviours of transmission peak shift. The transmission through the rectangular air-hole structures exhibits an obvious polarization effect dependent on the morphology. Numerical simulations are also made by a plane-wave transfer-matrix method and in good consistency with the experimental results.

关键词： surface plasmon extraordinary light transmission metal film

Spatial and Temporal Evolution of Ultra-Wide-Band optical Pulses in Propagation

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Chinese physics Letters 2000年第8期17卷 568-570页

作者： XU Jing-Zhou WANG Li YANG Guo-Zhen laboratory of optical physics Institute of PhysicsChinese Academy of SciencesBeijing 100080

The propagation of ultrashort coherent electromagnetic pulses with broad spectral bandwidth in free space is studied by using scalar diffraction *** is confirmed and experimentally demonstrated that the diffraction not only affects the spatial structure but also changes the temporal waveform of an ultra-wide-band pulse during *** terahertz pulse travelling as basic mode of Gaussian beam is discussed in detail.

关键词： ultrashort Spatial travelling

Measurements of Film Thickness and Growth Temperature of YBa_(2)Cu_(3)O_(7-δ) Films by Pyrometric Absorption Method

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Chinese physics Letters 1997年第5期14卷 367-370页

作者： XIONG Xu-ming ZHOU Yue-liang WANG Hui-sheng CUI Da-fu LU Hui-bin CHEN Zheng-hao YANG Guo-zhen optical physics laboratory Institute of PhysicsChinese Academy of SciencesBeijing 100080

A pyrometric absorption method suitable for strongly absorbing films has been developed to monitor the YBa_(2)Cu_(3)O_(7-δ)film *** method makes use of the temperature difference between the heater and the *** deducing the absorption formula of radiation light and fitting it to the radiation intensity data measured,it is possible to monitor the film thickness and the film surface temperature during *** results show that this is a simple and practicable method.

关键词： deposition. film absorption

Synchronously Pumped Femtosecond optical Parametric Oscillator Based on MgO-Doped Periodically Poled LiNbO3

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Chinese physics Letters 2007年第9期24卷 2603-2605页

作者：朱江峰钟欣滕浩孙敬华魏志义 laboratory of optical physics Institute of Physics Chinese Academy of Sciences Beijing 100080

We report a femtosecond optical parametric oscillator based on MgO-doped PPLN synchronously pumped by a mode-locked Ti：sapphire laser. The wavelengths of the signal and idler are continuously tuned from 1100 to 1300hm and from 2080 to 2930nm, respectively, by changing the pump wavelength and the OPO cavity length. The maximum signal output power of 130mW at the wavelength of 1225nm is obtained, pumped by 900roW of 800hm laser radiation. This corresponds to a total conversion efficiency of 22.1%. The signal pulse duration is measured to be 167fs by intensity autocorrelation with chirped mirrors for intracavity dispersion compensation.

关键词： coated conductor buffer layer self-epitaxy CeO2

High-Order Stimulated Raman Emission and Two-Photon Stimulated Emission by Photodissociation of PbI_(2) Molecules

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Chinese physics Letters 2000年第11期17卷 801-803页

作者： MAN Bao-Yuan ZHANG Jie NI Pei-Gen ZHANG Dao-Zhong laboratory of optical physics Institute of PhysicsChinese Academy of SciencesBeijing 100080

When focusing YAG laser pulses at 266nm into a heat-pipe oven containing PbI2 molecules vapor,four red line emissions at 626.0,619.8,613.7 and 621.8nm are *** photodissociation mechanism of PbI_(2) molecules and the possible generation channels of these four line emissions are ***,the dependence of the emission at 626.0nm on incident laser energy and heat-pipe temperature is *** experimental observation is well supported by the photodissociation mechanism proposed by us.

关键词： PbI_(2) laser mechanism

Antitrace Maps and Light Transmission Coefficients for Generalized Fibonacci Multilayers

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Chinese physics Letters 2001年第1期18卷 80-81页

作者： WANG Xiao-Guang PAN Shao-Hua YANG Guo-Zhen laboratory of optical physics Institute of PhysicsChinese Academy of SciencesBeijing 100080

By using the antitrace map method,we investigate the light transmission for generalized Fibonacci *** results are obtained for transmission coefficients in some special *** find that the transmission coefficients poss... 详细信息

关键词： property. Fibonacci cycle

Stimulated Emission at 722.9 nm by Laser Photodissociation of PbI_(2) Vapor

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Chinese physics Letters 2000年第9期17卷 672-674页

作者： Man Bao-Yuan ZHANG Jie NI Pei-Gen ZHANG Dao-Zhong laboratory of optical physics Institute of PhysicsChinese Academy of SciencesBeijing 100080

The stimulated emission at 722.9nm is observed by a direct photodissociation of the PbI2 molecules with a 266nm pulse *** possible dissociation channels are ***-photon resonant photodissociation mechanism is used to explain the generation of the 722.9 nm *** emission is measured at different incident laser energy and heat-pipe *** obtained experimental result is well supported by the photodissociation mechanism given by us.

关键词： temperature. PbI2 dissociation

Optimization of Drive Pulse Configuration for a High-Gain Transient X-Ray Laser at 19.6 nm

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Chinese physics Letters 2001年第10期18卷 1353-1355页

作者： LU Xin LI Ying-Jun ZHANG Jie laboratory of optical physics Institute of PhysicsChinese Academy of SciencesBeijing 100080

An Ne-like transient collisional excitation x-ray laser at 19.6nm (J = 0 → 1, 3p - 3s) was investigated numerically using a sophisticated hydrodynamic code for a l00μm thick Ge planar target irradiated by a nanosecond pre pulse followed by a picosecond main optical laser pulse. The simulations indicate that for a given peak intensity, the main pulse has an optimal duration to generate the maximum effective gain. An effective gain as high as 200 cma-1 was obtained for the optimized drive pulse configuration.

关键词： pulse Configuration Pulse

Vacuum heating of solid target irradiated by femtosecond laser pulses

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Science China(physics,Mechanics & Astronomy) 2003年第1期46卷 71-77页

作者： DONG Quanli(董全力) ZHANG Jie(张杰) laboratory of optical physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China

The interaction of femtosecond laser pulses with solid targets was studied through experiments and particle-in-cell (PIC) simulations. It is proved that the vacuum heating and the inverse bremsstralung process are the main mechanisms of the laser pulse absorption under such conditions. The distribution of hot electrons and that of X-ray are found to have double-temperature structure, which is confirmed by PIC simulations. While the lower temperature is attributed to the resonant absorption, the higher one, however, is caused by the laser-induced electric field in the target normal direction. The time-integrated spectra ofthe reflected laser pulse shows that the mechanism of electron acceleration is determined by the plasma density profile.

关键词： vacuum heating, electron acceleration, harmonics.