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Chinese Journal of Chemistry 2004年第11期22卷 1235-1238页

作者：陈家富薛旋 Structure Research Laboratory University of Science and Technology of China Hefei Anhui 230026 China

A study was made of magnetic field effects (MFEs) on the photoreduction reaction of 2-methyl-1,4-naphthoqui- none (MNQ) in Brij 35 micellar solution containing 4-lauroylamino-TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) radical (L-R) under magnetic fields below 1.75 T by a nanosecond laser flash photolysis technique. The triplet MNQ mainly underwent the hydrogen abstraction from Brij 35 molecule to give a radical pair. The escaped radical yield increased with magnetic fields from 0 to 0.62 T and then saturated from 0.62 to 1.75 T. MFEs for both sys-tems can be explained by the relaxation mechanism. However, it was supposed that additional radical, L-R affected the MFEs mainly through enhancing the spin-spin interactions of radical pairs. The effect of the micelle size on MFEs of the studying system was also discussed.

关键词： magnetic field effects micellar solution 2-methyl-1,4-naphthoquinone laser photolysis

Tunneling-induced π-phase shift with a single-photon signal field in asymmetric double quantum wells

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Chinese Optics Letters 2009年第10期7卷 886-890页

作者：郭洪菊汪丽春钮月萍金石琦龚尚庆 State Key Laboratory of High field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

A theoretical investigation is carried out into the cross phase modulation （XPM） in an asymmetric double A1GaAs/GaAs quantum wells structure with a common continuum. It is found that, combining resonant tunneling-induced transparency and constructive interference in the third-order Kerr effect, a giant XPM can be achieved with vanishing linear and nonlinear absorptions, accompanied by the velocities of the probe and signal fields being matched. Furthermore, this giant XPM could induce a π-phase shift at a single-photon level which is favorable for the applications in two-qubit quantum logic gates.

关键词： Kerr magnetooptical effect magnetic field effects Particle beams Phase shift Photons Quantum theory Wind tunnels

Design of internal Brewster guided-mode resonance filter

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Chinese Optics Letters 2009年第6期7卷 462-464页

作者：傅小勇易葵邵建达范正修 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

An internal Brewster guided-mode resonance （GMR） filter is designed. For this kind of GMR filter, the Brewster reflection occurs at the interface of grating/waveguide layers rather than at the interface of air/grating layers. At Brewster angle of 60~, the GMR filter owns almost 100% reflection at the resonance wavelength of 800 nm with the full-width at half-maximum （FWHM） of 0.2 nm. Its angle response changing with the fabrication deviation is also discussed.

关键词： Giant magnetoresistance magnetic field effects magnetic recording

Design of single-material guided-mode resonance filter

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Chinese Optics Letters 2009年第1期7卷 9-11页

作者：傅小勇易葵邵建达范正修 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

In this letter, a guided-mode resonance （GMR） filter with the same material for both the grating layer and the waveguide layer is designed, and its optical properties are investigated. The GMR filter owns almost 100% reflection at the resonance wavelength of 800 nm with the full-width at half-maximum （FWHM） of 20 nm, and its sideband reflection from 700 to 1000 nm is less than 5%. As the resonance wavelength is influenced by more than one parameter during the fabrication process, GMR filter with the same resonance wavelength can be obtained by adjusting other parameters or even one parameter to deviate from the design value.

关键词： Giant magnetoresistance magnetic field effects magnetic recording Magnetoresistance Optical properties

Measurement of third-order nonlinear optical susceptibility of synthetic diamonds

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Chinese Optics Letters 2010年第7期8卷 685-688页

作者：赵建勋贾刚刘秀环陈占国唐杰王爽 State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin University College of Communication Engineering Jilin University Applied Technique College Jilin University

Diamonds are wide-gap semiconductors possessing excellent physical and chemical properties; thus, they are regarded as very appropriate materials for optoelectronic devices. Based on the Kerr effect, we introduce a simple and feasible method for measuring the third-order nonlinear optical susceptibility of synthetic diamonds. In the experiments, synthetic type I diamond samples and transverse electro-optic modulation systems are utilized. As for the laser with the wavelength of 650 nm, the third-order susceptibility and Kerr coefficient of the diamond samples are obtained at X1212（3） = 2.17 × 10^-23 m2/V2 and S44 = 1.93 ×12^-23 m2/V2, respectively.

关键词： Chemical properties Diamonds Kerr magnetooptical effect magnetic field effects Nonlinear optics Optoelectronic devices Synthetic diamonds

Local magneto-optical Kerr effect imaging by scanning near-field optical microscope in reflection-mode

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Chinese Optics Letters 2010年第3期8卷 313-315页

作者：蔡微商广义姚骏恩 Department of Applied PhysicsBeihang University

A method for local magneto-optical Kerr effect imaging based on a home-made scanning near-field optical microscope working in reflection mode is presented. Shear force detection is carried out by using a symmetric piezoelectric bimorph sensor, which provides an easy way not only for probe-surface distance control but also for imaging. Polarization-preserving fiber probes used as a local optical detector are fabricated with a heating-pulling technique and the probes＇ polarization properties are measured. Shear force topographic and near-field magneto-optical images of magueto-optical disk taken with the proposed method are shown.

关键词： Geometrical optics Kerr magnetooptical effect magnetic field effects Magnetos Microscopes Polarization Probes Sensors

Oxygen Incorporation in Czochralski Growth of Silicon under a Horizontal magnetic field

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Rare Metals 1990年第1期10卷 52-57页

作者： Wang, Tihu Li, Yingchun Qin, Fu General Research Inst for Non-ferrous Metals China

A mechanism of oxygen transportation in Czochralski growth of silicon crystals under a horizontal magnetic field (HMCZ) is proposed. Oxygen depleted surface melt, driven to the growth interface by the thermal Marangoni flow, determines oxygen concentration in the grown crystals. Systematic study was carried out to investigate effects of growth parameters on oxygen incorporation into crystals.

关键词： Crystals Defects Flow of Fluids Turbulent Liquid Metals magnetic field effects Oxygen Transport Properties Silicon and Alloys Molten

磁流变流体挤压油膜阻尼器转子系统动力特性(英文)

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Chinese Journal of Aeronautics 2001年第1期14卷 6-12页

作者：祝长生 Department of Electrical Engineering Zhejiang University Hangzhou 310027 China

Using special characteristics of magneto-rheological (MR) fluid with rapid, reversible and dramatic change in its viscosity by an external magnetic field, a novel controllable magneto-rheological fluid squeeze film damper is presented in this paper. After analyzing the effects of the MR fluid, the externally applied magnetic flux density and the radial clearance of the damper on the behavior of a flexible rotor supported on the MR fluid squeeze film damper in the non-rotating state, an experimental study is carried out on the controllability and effectiveness of the MR fluid squeeze film damper on the rotor vibration in the rotating state. The existing problems in the MR fluid squeeze film damper, such as unbalanced magnetic pull force, and MR fluid sediment, which may result in the failure of the MR fluid squeeze film damper application, are also discussed. It is shown that not only can the dynamical characteristics of the MR fluid squeeze film damper be controlled by a simple external magnetic field, but also the applied voltage required to dramatically change the dynamic characteristics of the MR fluid squeeze film damper is much lower. The MR fluid squeeze film damper is a very effective way to control the vibration of a rotor system.

关键词： Damping Electric potential magnetic field effects magnetic flux Vibration control Viscosity