Behaviors of ellipsoidal micro-particles within a two-beam optical levitator

Abstract : The two-beam levitator (TBL) is a standard optical setup made of a couple of counter-propagating beams. Note worthily, TBLs allow the manipulation and trapping of particles at long working distances. While much experience has been accumulated in the trapping of single spherical particles in TBIs, the behaviors of asymmetrical particles turn out to be more complex, and even surprising. Here, we report observations with prolate ellipsoidal polystyrene particles, with varying aspect ratio and ratio of the two beam powers. Generalizing the earlier work by Mihiretie et al. in single beam geometries [JQSRT 126, 61 (2013)], we observe that particles may be either static, or permanently oscillating, and that the two-beam geometry produces new particle responses: some of them are static, but non-symmetrical, while others correspond to new types of oscillations. A two-dimensional model based on ray-optics qualitatively accounts for these configurations and for the "primary" oscillations of the particles. Furthermore, levitation powers measured in the experiments are in fair agreement with those computed from GLMT (Generalized Lorentz Mie Theory), MLFMA (Multilevel Fast Multipole Algorithm) and approximate ray-optics methods. (C) 2017 Elsevier Ltd. All rights reserved.
Type de document :
Article dans une revue
Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2017, 195, pp.85--96. 〈10.1016/j.jqsrt.2016.12.009〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01611192
Contributeur : Alexandre Poux <>
Soumis le : jeudi 5 octobre 2017 - 15:35:29
Dernière modification le : mardi 5 juin 2018 - 10:14:20

Identifiants

Citation

T. Petkov, M. Yang, K. F. Ren, B. Pouligny, J.-C. Loudet. Behaviors of ellipsoidal micro-particles within a two-beam optical levitator. Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2017, 195, pp.85--96. 〈10.1016/j.jqsrt.2016.12.009〉. 〈hal-01611192〉

Partager

Métriques

Consultations de la notice

66