Optomechanical forces and electrostriction in laser optical materials

David L. Andrews; Richard G. Crisp

doi:10.1117/12.678039

30 August 2006 Optomechanical forces and electrostriction in laser optical materials

David L. Andrews, Richard G. Crisp

Proceedings Volume 6326, Optical Trapping and Optical Micromanipulation III; 63260I (2006) https://doi.org/10.1117/12.678039
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

With optical tweezer methods now firmly established and the nature of optical forces on individual particles well understood, one of the separate but related issues that has only recently come to the fore concerns the effects of intense optical radiation on inter-particle forces. It has already been established that such forces, which are not dependent on optical field gradients, can effect a weak binding between particles leading in some cases to optical clustering and in others to pattern formation. In this presentation it is shown by quantum electrodynamical analysis that a variety of other optomechanical effects can be produced in materials or systems subjected to the throughput of intense, non-resonant laser radiation. In particular, an optical electrostriction phenomenon is identified and shown to be widely operative in laser optical materials. Although a classical electrodynamical interpretation (in terms of interactions between induced dipoles) comfortably predicts the sign of the resulting mechanical force, it is shown that such a picture has significant limitations in addressing this fundamentally photonic phenomenon. The key parameters that determine the size and character of optical electrostriction are delineated and its significance is quantitatively assessed. The experimental challenges involved in characterizing such phenomena are also given a detailed appraisal.

Citation Download Citation

David L. Andrews and Richard G. Crisp "Optomechanical forces and electrostriction in laser optical materials", Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63260I (30 August 2006); https://doi.org/10.1117/12.678039

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KEYWORDS

Molecules

Particles

Electrostriction

Solids

Laser optics

Quantum electrodynamics

Polarization

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