All-optical modulator based on a ferrofluid core metal cladding waveguide chip

doi:10.1088/1674-1056/22/9/094215

Abstract We propose a novel optical intensity modulator based on the combination of a symmetrical metal cladding optical waveguide (SMCW) and ferrofluid, where the ferrofluid is sealed in the waveguide to act as a guiding layer. The light matter interaction in the ferrofluid film leads to the formation of a regular nanoparticle pattern, which changes the phase match condition of the ultrahigh order modes in return. When two lasers are incident on the same spot of the waveguide chip, experiments illustrate all-optical modulation of one laser beam by adjusting the intensity of the other laser. A possible theoretical explanation may be due to the optical trapping and Soret effect since the phenomenon is considerable only when the control laser is effectively coupled into the waveguide.

Keywords: symmetrical metal cladding waveguide chip ultrahigh order modes ferrofluids all-optical devices

Received: 09 November 2012
Revised: 01 April 2013
Accepted manuscript online:

PACS:	42.82.Et	(Waveguides, couplers, and arrays)
	47.65.Cb	(Magnetic fluids and ferrofluids)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11274091 and 11274092) and the Fundamental Research Funds for the Central Universities of Hohai University, China (Grant No. 2011B11014).

Corresponding Authors: Yin Cheng
E-mail: cyin.phys@gmail.com

Cite this article:

Han Qing-Bang (韩庆邦), Yin Cheng (殷澄), Li Jian (李建), Tang Yi-Bin (汤一彬), Shan Ming-Lei (单鸣雷), Cao Zhuang-Qi (曹庄琪) All-optical modulator based on a ferrofluid core metal cladding waveguide chip 2013 Chin. Phys. B 22 094215

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All-optical modulator based on a ferrofluid core metal cladding waveguide chip

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