Characterization of a periodic optical potential by means of particle dynamics analysis in a deterministic regime

A. V. Arzola; Adriana Toledo-Cortes; Karen Volke-Sepúlveda; Jose L. Mateos

doi:10.1117/12.795712

29 August 2008 Characterization of a periodic optical potential by means of particle dynamics analysis in a deterministic regime

A. V. Arzola, Adriana Toledo-Cortes, Karen Volke-Sepúlveda, Jose L. Mateos

Author Affiliations +

Proceedings Volume 7038, Optical Trapping and Optical Micromanipulation V; 703825 (2008) https://doi.org/10.1117/12.795712
Event: NanoScience + Engineering, 2008, San Diego, California, United States

Abstract

We propose a technique for the characterization of a 1D-periodic optical potential by studying the dynamics of non-brownian microscopic particles immerse in water (negligible thermal noise). It has been demonstrated that in the Mie regime, a periodic light pattern applied to a particle acts as an effective potential that depends on the size of the particle respect to the period of the optical landscape [I. Ricardez-Vargas, et.al. Appl. Phys. Lett. 88, 121116 (2006)]. We verify this fact by studying the dynamics of a particle moving within the pattern due to the effect of a known constant external force. The periodic light pattern is generated with interference techniques whereas the external force is applied by means of a controlled inclination of the sample cell. We fit the experimental results for the ensemble average of particle position against time with a theoretical model of the physical situation. In this way we obtain a curve for the optical force as a function of particle's position for different periods.

Citation Download Citation

A. V. Arzola, Adriana Toledo-Cortes, Karen Volke-Sepúlveda, and Jose L. Mateos "Characterization of a periodic optical potential by means of particle dynamics analysis in a deterministic regime", Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 703825 (29 August 2008); https://doi.org/10.1117/12.795712

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