OPTICAL 2ND-HARMONIC GENERATION FROM ADSORBATE LAYERS IN TOTAL-REFLECTION GEOMETRY

Citation
Bu. Felderhof et al., OPTICAL 2ND-HARMONIC GENERATION FROM ADSORBATE LAYERS IN TOTAL-REFLECTION GEOMETRY, Journal of the Optical Society of America. B, Optical physics, 10(10), 1993, pp. 1824-1833
Citations number
27
Categorie Soggetti
Optics
ISSN journal
07403224
Volume
10
Issue
10
Year of publication
1993
Pages
1824 - 1833
Database
ISI
SICI code
0740-3224(1993)10:10<1824:O2GFAL>2.0.ZU;2-4
Abstract
We study optical second-harmonic generation by a layer of molecules ad sorbed on the hypotenuse face of a glass prism, excited from the glass side. We show that second-harmonic generation is particularly effecti ve when the angle of incidence exceeds the critical angle for total re flection. The second-harmonic intensity is calculated as a function of angle of incidence and polarization of the fundamental wave. In total reflection the necessary linear and nonlinear Fresnel factors turn ou t to be complex valued. We show that rotational intensity patterns, ob tained by plotting the second-harmonic intensity as a function of inci dent polarization angle at fixed angle of incidence, may be used to de termine second-order susceptibility components of isotropic adsorbate layers. We verify the theoretical predictions for experimental samples prepared as thin organic films of highly nonlinear hemicyanine dyes b y the Langmuir-Blodgett technique.