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Cascading processes in the nonlinear diffraction of light by standing acoustic waves

Title
Cascading processes in the nonlinear diffraction of light by standing acoustic waves
Author
이영백
Keywords
OPTICAL 2ND-HARMONIC GENERATION; ORIENTATION-PATTERNED GAAS; MAGNETOOPTICAL DIFFRACTION; HARMONIC-GENERATION; PHOTONIC CRYSTALS; ENHANCEMENT; REFLECTION; FILMS
Issue Date
2016-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW A, v. 93, NO 1, Article number 013815, Page. 13815-13823
Abstract
The contribution of two types of cascading process to the nonlinear optical diffraction of electromagnetic waves from a standing acoustic wave in a GaAs crystal is theoretically studied. The first type of cascading process results from second-harmonic generation followed by linear acousto-optical diffraction, while the second type involves linear acousto-optical diffraction from the standing acoustic wave and subsequent sum-frequency generation. In contrast to the third, direct, nonlinear acousto-optical diffraction process we previously investigated, the photoelastic interaction between electromagnetic and acoustic waves is here linear. We establish the rules governing the cascading processes and show that in most cases the output signal simultaneously results from two or even three of the possible nonlinear diffraction mechanisms. However, we demonstrate that a careful choice of the incidence angles of the incoming electromagnetic waves, of the polarization combinations of the incoming and diffracted waves, and of the type of acoustic wave (longitudinal or transverse) makes it always possible to distinguish between the direct and either of the two cascading processes.
URI
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.013815http://hdl.handle.net/20.500.11754/30553
ISSN
2469-9926; 2469-9934
DOI
10.1103/PhysRevA.93.013815
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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