Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1088/1612-202x/acb7f5
Аннотация: <jats:title>Abstract</jats:title> <jats:p>Quasi-phase matched nonlinear frequency conversion in three dimensional nonlinear photonic crystals (NPCs) has been considered for implementation of the second harmonic generation of transform-limited and chirped femtosecond laser pulses. Spatial distribution of the second harmonic intensitПоказать полностьюy is shown to be caused by Cherenkov- and Raman–Nath-type nonlinear diffraction. These types of nonlinear diffraction may occur simultaneously resulting in an efficient multi-order nonlinear diffraction in the Bragg regime, which can be realized by a proper choice of the modulation period of NPC structure in longitudinal direction for considered transverse diffraction order. Three dimensional NPCs open up new possibilities for ultrafast nonlinear photonics and parametric interactions in optics.</jats:p>
Журнал: Laser Physics Letters
Выпуск журнала: Т. 20, № 3
Номера страниц: 035402
ISSN журнала: 16122011
Издатель: Institute of Physics and IOP Publishing Limited