High-order harmonic generations in intense MIR fields by cascade three-wave mixing in a fractal-poled LiNbO_3 photonic crystal | Zendy

Hyunwook Park | Zendy; A. Camper | Zendy; Kyle R. P. Kafka | Zendy; Boqin Ma | Zendy; Yu Hang Lai | Zendy; Cosmin I. Blaga | Zendy; Pierre Agostini | Zendy; Louis F. DiMauro | Zendy; Enam Chowdhury | Zendy

Open Access

High-order harmonic generations in intense MIR fields by cascade three-wave mixing in a fractal-poled LiNbO_3 photonic crystal

Author(s) -

Hyunwook Park,

A. Camper,

Kyle R. P. Kafka,

Boqin Ma,

Yu Hang Lai,

Cosmin I. Blaga,

Pierre Agostini,

Louis F. DiMauro,

Enam Chowdhury

Publication year - 2017

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.42.004020

Subject(s) - femtosecond , optics , photon upconversion , cascade , harmonics , laser , physics , nonlinear optics , high harmonic generation , photonic crystal , materials science , second harmonic generation , four wave mixing , harmonic , optoelectronics , chemistry , chromatography , quantum mechanics , voltage

We report on the generation of harmonic-like photon upconversion in a LiNbO3-based nonlinear photonic crystal by mid-infrared (MIR) femtosecond laser pulses. We study below bandgap harmonics of various driver wavelengths, reaching up to the 11th order at 4 μm driver with 13% efficiency. We compare our results to numerical simulations based on two mechanisms: cascade three-wave mixing and non-perturbative harmonic generation, both of which include quasi-phase matching. The cascade model reproduces well the general features of the observed spectrum, including a plateau-like harmonic distribution and the observed efficiency. This has the potential for providing a source of tabletop few femtosecond ultraviolet pulses.

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