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Proceedings Paper

Amplitude-phase modulation for reducing the 0th order beam spot in holographic optical tweezers
Author(s): Toshiaki Iwai; Johtaro Yamamoto; Yuki Doi
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Paper Abstract

The 0-th order diffraction light in an intensity pattern produced by a hologram disturbs optical manipulation of micro-objects in dynamic holographic optical tweezers (HOT). The purpose of this study is to investigate polarization characteristics of amplitude and phase modulations in the HOT to reduce the influence of the 0-th order beam spot. Numerical simulations are conducted using a Jones matrix of the system, whose the validity is experimentally confirmed. The optimum conditions to reduce the influence of the 0-th order beam spot can be estimated on the bases of the numerical results and its effectiveness in performance of the HOT system is experimentally demonstrated by the optical manipulation of polystyrene particles.

Paper Details

Date Published: 27 August 2010
PDF: 8 pages
Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 77622G (27 August 2010); doi: 10.1117/12.863551
Show Author Affiliations
Toshiaki Iwai, Tokyo Univ. of Agriculture and Technology (Japan)
Johtaro Yamamoto, Hokkaido Univ. (Japan)
Yuki Doi, Tokyo Univ. of Agriculture and Technology (Japan)


Published in SPIE Proceedings Vol. 7762:
Optical Trapping and Optical Micromanipulation VII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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