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Enhancement of nonlinear Raman-Nath diffraction in two-dimensional optical superlattice

Wang, Wenjie; Sheng, Yan; Roppo, Vito; Chen, Zhihui; Niu, Xiaoying; Krolikowski, Wieslaw


We study second harmonic generation via nonlinear Raman-Nath diffraction in an optical superlattice that maintains a periodic modulation of the second-order nonlinear coefficient χ⁽²⁾ in transverse direction but undergoes random modulation in longitudinal direction. We show that the random χ⁽²⁾ modulation offers a continuous set of reciprocal lattice vectors to compensate for the phase mismatch of nonlinear Raman-Nath diffraction in the longitudinal direction, leading to more efficient harmonic...[Show more]

CollectionsANU Research Publications
Date published: 2013-07-30
Type: Journal article
Source: Optics Express
DOI: 10.1364/OE.21.018671
Access Rights: Open Access


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