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Off-axis quasi-phase-matched second-order optical nonlinearity from χ ( 2 ) gratings induced by holographic all-optical poling

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Abstract

We present here the quasi-phase-matched second-harmonic (SH) light of holographic all-optical poling measured along the off-axis direction of the wave vector of 4kωk2ω+Δk with Δk=0, where kω is the wave vector of ω writing beam, k2ω is the wave vector of 2ω writing beam, and Δk is the wave-vector mismatch whose vector is parallel to kω. As expected, Δk0 of the phase-mismatched condition gave rise to a very low SH signal. Furthermore, tensor components of χ(2) gratings were analyzed, and the contribution of the photoisomeric state of the cis configuration of azobenzene chromophore studied was discussed.

© 2011 Optical Society of America

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