Document Type

Journal Article

Department/Unit

Department of Physics

Title

Laser induced surface stress on water droplets

Language

English

Abstract

Laser induced stress on spherical water droplets is studied. At mechanical equilibrium, the body stress vanishes therefore we consider only the surface stress. The surface stress on sub-wavelength droplets is slightly weaker along the light propagation direction. For larger droplets, due to their light focusing effect, the forward stress is significantly enhanced. For a particle roughly 3 micron in radius, when it is excited at whispering gallery mode with Q ∼ 104 by a 1 Watt Gaussian beam, the stress can be enhanced by two orders of magnitude, and can be comparable with the Laplace pressure.

Publication Date

10-2014

Source Publication Title

Optics Express

Volume

22

Issue

20

Start Page

23770

End Page

23775

Publisher

Optical Society of America

Peer Reviewed

1

Funder

The supports from HK RGC through grants HKBU 604011, HKBU 603312, and HKBU 209913 are gratefully acknowledged. NW and ZL were also supported by the China 973 Project (Nos. 2011CB922004 and 2013CB632701) and China National Natural Science Foundation (No. 11174059). Computational resources were supported by the Information Technology Office of HKBU.

DOI

10.1364/OE.22.023770

Link to Publisher's Edition

http://dx.doi.org/10.1364/OE.22.023770

ISSN (print)

10944087

ISSN (electronic)

10944087

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