Theory of second harmonic generation in a chirped 2Dnonlinear optical superlattice under nonlinear Raman-Nath diffractionстатья
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Дата последнего поиска статьи во внешних источниках: 16 февраля 2016 г.
Аннотация:We analyze second harmonic generation (SHG) in a two dimensional nonlinear optical superlattice (NLOS) with its modulation period being chirped in the propagation direction and constant in the transverse direction. This results in efficient multiple SHG via nonlinear Raman-Nath diffraction. We obtain exact analytical expressions for a SH amplitude generated in chirped 2D NLOSs and for its quasi-phasematching bandwidth. The results of analytical calculations are in excellent agreement with the numericalones. We show that the process is robust to angular deviations of NLOS and it can be applied to enable
tunable and broadband frequency conversion.