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Surface diagnostics and spectroscopy of nonlinear gyrotropic medium based on polarization effects due to interaction of two waves
Author(s): A. A. Golubkov; Vladimir A. Makarov
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Paper Abstract

The interest in nonlinear liqht reflection phenomena is caused by the fact that they can give a unique information about crystals' surface properties In this work we have used the boundary conditions on the surface of nonlinear media with space dispersion (SD) obtained in. We have considered phenomenologically polarization effects due to interaction of the two arbitrarily polarized waves durinq both propagation and reflection from crystals of cubic, hexagonal and tetraqonal crystal systems (the incident angles of light are supposed equal to zero, and the crystal optical axis to be perpendicular to the boundary). 10 both cases for media with weak gyrotropy four mechanisms of nonlinear optical rotation (NLOR) and deformation (NLOD) of polarization ellipses have been determined. It has been made )fl a first approximation with respect to the parameter of SD Jd/. (here ci is a characteristic length of spatial non-locality ot response, ?*, is a wavelength). The influence of linear qyrotrop>' and dissipation on the interaction ha also been investigated. A nonlinear polarization spectroscopy scheme has been suggested. This scheme allows one to distinqush between contributions of different NLtJR and ILOD rnechansms irrespective of the crystal symmetry. The study of NLOR and NLOD effects during the interaction of two elliptically poirized waves with the medium is shown to give three or four as much spectroscopy information on the cubic nonlinearity and )ts SD as in the case of application of a plane polarized wave. Moreover the joint study of liqht polarization interaction during both reflection and propagation of waves through the crystal is most effective. This is connected with the fact that spectroscopy information received in experiments 'on reflection' and 'on propagation' is complementary to a great degree

Paper Details

Date Published: 24 September 1993
PDF: 10 pages
Proc. SPIE 1711, High-Performance Optical Spectrometry, (24 September 1993); doi: 10.1117/12.155684
Show Author Affiliations
A. A. Golubkov, Moscow State Univ. (Russia)
Vladimir A. Makarov, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 1711:
High-Performance Optical Spectrometry
Maksymilian Pluta; Aleksandra Kopystynska; Mariusz Szyjer, Editor(s)

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