Аннотация: We study second-harmonic generation (SHG) of femtosecond laser pulses in a rectangular two-dimensional nonlinear photonic crystal (NLPC). Multiple SH beams were observed in the vicinity of the propagation direction of the fundamental beam. It has been verified that the angular positions of these beams obey the conditions of nonlinear Raman-Nath diffraction (NRND). The measured SH spectra of specific NRND orders consist of narrow peaks that experience a high-frequency spectral shift as the order grows. We derive an analytical expression for the process studied and find the theoretical results to be in good agreement with the experimental data. We estimate the enhancement factor of nonlinear Raman-Nath diffraction in 2D NLPC to be 70. (C) 2015 Optical Society of America
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660079, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660079, Russia.
Ural Fed Univ, Ekaterinburg 620000, Russia.
Labfer Ltd, Ekaterinburg 620014, Russia.
Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia.
Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119992, Russia.
Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Slabko, V. V.; Слабко, Виталий Васильевич; Baturin, I. S.; Akhmatkhanov, A. R.; Shur, V. Ya.; Chirkin, A. S.; Council of the President of the Russian Federation [MK-2908.2015.2]; Ministry of Education and Science of the Russian Federation [2014/7, UID RFMEFI59414X0011]; Russian Foundation for Basic Research (RFBR) [13-02-01391-a, 14-02-01160-a, 15-02-03838]