Theory of second-harmonic generation in a chirped 2D nonlinear optical superlattice under nonlinear Raman-Nath diffraction
URI (for links/citations):http://elib.sfu-kras.ru/handle/2311/28042
Vyunishev, A. M.
Arkhipkin, V. G.
Chirkin, A. S.
Институт инженерной физики и радиоэлектроники
Базовая кафедра фотоники и лазерных технологий
Journal Name:Journal of the Optical Society of America B
Journal Quartile in Scopus:Q1
Bibliographic Citation:Vyunishev, A. M. Theory of second-harmonic generation in a chirped 2D nonlinear optical superlattice under nonlinear Raman-Nath diffraction [Текст] / A. M. Vyunishev, V. G. Arkhipkin, A. S. Chirkin // Journal of the Optical Society of America B: Optical Physics. — 2015. — Т. 32 (№ 12). — С. 2411-2416
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-phase-matching bandwidth. The results of analytical calculations are in excellent agreement with the numerical ones. We show that the process is robust to angular deviations of NLOS and it can be applied to enable tunable and broadband frequency conversion.
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