標題: Resolution improvement in laser diode-based pump-probe microscopy with an annular pupil filter
作者: Miyazaki, Jun
Kawasumi, Koshi
Kobayashi, Takayoshi
電子物理學系
Department of Electrophysics
公開日期: 15-Jul-2014
摘要: We experimentally demonstrate the use of annular beams to improve lateral resolution in laser-diode-based pump-probe microscopy. We found that the width of the point-spreading function in the case of the annular pump-probe beams is 162 nm, which is 30% smaller than that of the circular beams (232 nm). Furthermore, side lobes were efficiently suppressed at the focal plane since the pump-probe signal is proportional to the product of the two beam intensities. This scheme is demonstrated for the photothermal signal of nonfluorescent gold nanoparticles and the stimulated emission signal of fluorescence beads. (C) 2014 Optical Society of America
URI: http://dx.doi.org/10.1364/OL.39.004219
http://hdl.handle.net/11536/24875
ISSN: 0146-9592
DOI: 10.1364/OL.39.004219
期刊: OPTICS LETTERS
Volume: 39
Issue: 14
起始頁: 4219
結束頁: 4222
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