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A SIMULTANEOUS multi-probe DETECTION LABEL-FREE OPTICAL-RESOLUTION PHOTOACOUSTIC MICROSCOPY TECHNIQUE BASED ON MICROCAVITY TRANSDUCER

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Journal of Innovative Optical Health Sciences 2013年第3期6卷 108-113页

作者： YONGBO WU ZHILIE TANG YAN CHI LIRU WU School of Physics and Telecom Engineering South China Normal University Guangzhou 510006P.R.China Laboratory of Quantum Information Technology South China Normal University IMOTGuangzhou 510006P.R.China

We demonstrate the feasibility of simultancous multi-probe detection for an optcal-resolution photoacoustic microscopy(OR-PAM)***-P AM has elicited the attention of biomedical imaging researchers because of its optical absorption contrast and high spatial resolution with great imaging ***-PAM allows label-free and noninvasive imaging by maximizing the optical absorption of endogenous ***,given the inadequate absoption of some biomolcules,detection sensitivity at the same incident intensity requires *** this study,a modulated continuous wave with power density less than 3mW/cm^(2)(1/4 of the ANSI safety limit)excited the weak photoacoustic(PA)signals of biological cells.A microcavity traneducer is developed based on the bulk modulus of gas five orders of magnitude lower than that of solid;air pressure variation is inversely proportional to cavity volume at the same temperature *** that a PA wave expands in various directions,detecting PA signals from different positions and adding them together can increase detection sensitivity and signal-to-noise ***,we employ four detectors to acquire tiny PA signals *** results show that the developed OR-PAM system allows the label-free imaging of cells with weak optical absorption.

关键词： multi-probe label free optical-resolution photoacoustic microscopy

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A multi-probe micro-fabrication apparatus based on the friction-induced fabrication method

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Frontiers of Mechanical Engineering 2013年第4期8卷 333-339页

作者： Zhijiang WU Chenfei SONG Jian GUO Bingjun YU Linmao QIAN Tribology Research Institute Key Laboratory of Advanced Technologies of MaterialsMinistry of EducationSouthwest Jiaotong University

A novel multi-probe micro-fabrication apparatus was developed based on the friction-induced fabrication *** main parts of the apparatus include actuating device,loading system,and control *** a motorized XY linear stage,the maximum fabrication area of 50 mm×50 mm can be achieved,and the maximum sliding speed of probes can be as high as 10 mm/*** locating steel micro balls into indents array,the preparation of multi-probe array can be realized by a simple and low-cost *** cantilever was designed as a structure of deformable parallelogram with two beams,by which the fabrication force can be precisely *** the friction-induced scanning with selective etching in KOH solution,various micro-patterns were fabricated on Si(100)surface without any masks or *** a low-cost and high efficiency fabrication device,the multi-probe micro-fabrication apparatus may encourage the development of friction-induced fabrication method and shed new light on the texture engineering.

关键词： friction-induced fabrication silicon surface texture friction multi-probe

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Ultrafast magneto-optical dynamics in nickel(111)single crystal studied by the integration of ultrafast reflectivity and polarimetry probes

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Chinese Physics B 2024年第3期33卷 65-69页

作者：匡皓余军潇陈洁 H.E.Elsayed-Ali 李润泽 Peter M.Rentzepis School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Center for Ultrafast Science and Technology Key Laboratory for Laser Plasmas (Ministry of Education)Collaborative Innovation Center of IFSA (CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Department of Electrical and Computer Engineering Old Dominion UniversityNorfolkVirginia 23529USA Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTexas 77843USA

With the integration of ultrafast reflectivity and polarimetry probes,we observed carrier relaxation and spin dynamics induced by ultrafast laser excitation of Ni(111)single *** carrier relaxation time within the linear excitation range reveals that electron-phonon coupling and dissipation of photon energy into the bulk of the crystal take tens of *** the other hand,the observed spin dynamics indicate a longer time of about 120 *** further understand how the lattice degree of freedom is coupled with these dynamics may require the integration of an ultrafast diffraction probe.

关键词： ultrafast spin dynamics non-equilibrium dynamics multi-probe

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