Kull M, Coutaz JL, Meyrueix R. Experimental results of second-harmonic generation from a polyurethane waveguide on a silver grating coupler.
OPTICS LETTERS 1991;
16:1930-1932. [PMID:
19784184 DOI:
10.1364/ol.16.001930]
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Abstract
Second-harmonic generation by excitation of guided modes and the surface plasmon in a polyurethane-coated silver grating coupler is presented. In order to study the spectral dependence of the second-harmonic efficiency, two different pump wavelengths are used, 1064 and 1319 nm. For the longer-wavelength pump we observe a large enhancement of the second-harmonic efficiency as the incident angle is scanned through an electromagnetic resonance, whereas for the shorter-wavelength pump the second-harmonic wavelength falls within the absorption band of the polymer, and we observe unexpected minima instead of maxima.
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