Amplitude-phase modulation for reducing the 0th order beam spot in holographic optical tweezers

Toshiaki Iwai; Johtaro Yamamoto; Yuki Doi

doi:10.1117/12.863551

27 August 2010 Amplitude-phase modulation for reducing the 0th order beam spot in holographic optical tweezers

Toshiaki Iwai, Johtaro Yamamoto, Yuki Doi

Proceedings Volume 7762, Optical Trapping and Optical Micromanipulation VII; 77622G (2010) https://doi.org/10.1117/12.863551
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

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.

Citation Download Citation

Toshiaki Iwai, Johtaro Yamamoto, and Yuki Doi "Amplitude-phase modulation for reducing the 0th order beam spot in holographic optical tweezers", Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 77622G (27 August 2010); https://doi.org/10.1117/12.863551

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