標題: Femtosecond Trapping Efficiency Enhanced for Nano-sized Silica Spheres
作者: Usman, Anwar
Chiang, Wei-Yi
Masuhara, Hiroshi
應用化學系
Department of Applied Chemistry
關鍵字: laser trapping;femtosecond laser pulses;continuous wave laser;silica nanospheres;bright field microscopy
公開日期: 2012
摘要: We present a comparison of optical trapping of 50-nm-sized silica nanospheres, suspended in water medium, by femtosecond laser pulses and by continuous wave laser beam. With bright field microscopic imaging, we demonstrated that intensity of scattering light at the focal area under fs-pulse mode is much higher than that under cw mode. This result offers a basic interpretation that trapping efficiency of nanometer-sized particles by the ultrashort laser pulses is higher than that by the cw mode at the same laser power. We interpret this finding by means of impulsive peak power of the femtosecond laser pulses.
URI: http://hdl.handle.net/11536/20739
http://dx.doi.org/10.1117/12.929462
ISBN: 978-0-8194-9175-6
ISSN: 0277-786X
DOI: 10.1117/12.929462
期刊: OPTICAL TRAPPING AND OPTICAL MICROMANIPULATION IX
Volume: 8458
Appears in Collections:Conferences Paper


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