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Strain-induced three-photon effects
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DOI：10.1103/PhysRevB.62.13455.png)
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Abstract
En 中文
Strain-induced three-photon effects such as; optical second-harmonic generation and hyper-Rayleigh light scattering, characterized by electromagnetic radiation at the double frequency of an incident light, are phenomenologically investigated by adopting a nonlinear photoelastic interaction. The relations between the strain and the nonlinear optical susceptibility for crystal surfaces with point symmetries of 4mm and 3m are described by a symmetry analysis of the nonlinear photoelastic tensor. We theoretically demonstrate a possibility of determining the strain components by measuring the rotational anisotropy of radiation at the second-harmonic frequency. Hyper-Rayleigh light scattering by dislocation strain is also described using a nonlinear photoelastic tensor. The angular dependencies of light scattered at the double frequency of an incident light for different scattering geometries are analyzed.
Keywords:
OPTICAL 2ND-HARMONIC GENERATION
HYPER-RAYLEIGH SCATTERING
INTERFACES
SPECTROSCOPY
ENHANCEMENT
TRANSITION
SURFACE
FILMS
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