Title: Controlling the transverse momentum distribution of a light field via azimuth division of a hologram in holographic optical tweezers
Authors: Tseng, Sheng-Yang
Hsu, Long
電子物理學系
Department of Electrophysics
Issue Date: 1-Dec-2011
Abstract: This study proposes a method for creating a light field with controlled distribution of transverse momentum (TM) by displaying a hologram only in an azimuth region that centers at theta(0) and has a range of Delta theta of a spatial light modulator in holographic optical tweezers. This study utilized ray optics to analyze the TM of the resultant field, revealing that the direction of the TM is determined by the center angle of the azimuth region and that the magnitude of the TM is proportional to sind(Delta theta/2), without regarding the intensity. The relationship was verified experimentally. In addition, this study demonstrated moving particles along a designed path and depleting particles by the fields. (C) 2011 Optical Society of America
URI: http://hdl.handle.net/11536/15042
ISSN: 0003-6935
Journal: APPLIED OPTICS
Volume: 50
Issue: 34
Begin Page: H62
End Page: H67
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