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Two-phonon absorption

M W Hamilton

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A nonlinear aspect of the acousto-optic interaction that is analogous to multi-photon absorption is discussed. An experiment is described in which the second-order acousto-optically scattered intensity is measured and found to scale with the square of the acoustic intensity. This experiment using a commercially available acousto-optic modulator is a suitable example of nonlinear response for undergraduate practical work.


PACS

63.20.-e Phonons in crystal lattices

01.50.Pa Laboratory experiments and apparatus

42.65.-k Nonlinear optics

78.20.Hp Piezo-, elasto-, and acoustooptical effects; photoacoustic effects

Subjects

Condensed matter: electrical, magnetic and optical

Optics, quantum optics and lasers

Education and communication

Condensed matter: structural, mechanical & thermal

Dates

Issue 2 (March 2007)

Received 16 October 2006, in final form 21 December 2006

Published 13 February 2007



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