Multi-octave spanning nonlinear interactions induced by femtosecond filamentation in polycrystalline ZnSe

被引：33

作者：

Suminas, R. ^{[1
]}

Tamosauskas, G. ^{[1
]}

Valiulis, G. ^{[1
]}

Jukna, V. ^{[2
,3
]}

Couairon, A. ^{[3
]}

Dubietis, A. ^{[1
]}

机构：

[1] Vilnius Univ, Dept Quantum Elect, Sauletekio Ave 10, LT-10223 Vilnius, Lithuania

[2] Univ Paris Saclay, Lab Opt Appliquee, Ecole Polytech, ENSTA ParisTech, F-91762 Palaiseau, France

[3] Univ Paris Saclay, CNRS, Ctr Phys Theor, Ecole Polytech, F-91128 Palaiseau, France

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 24期

关键词：

DIFFERENCE-FREQUENCY-GENERATION; OPTICAL HARMONIC-GENERATION; 2ND-HARMONIC GENERATION; PHOTONIC CRYSTALS; ZINC SELENIDE; LASER; BULK; SEMICONDUCTORS; SUPERCONTINUUM; ABSORPTION;

D O I：

10.1063/1.4986440

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on filamentation and supercontinuum generation in polycrystalline ZnSe by intense femtosecond laser pulses whose center wavelength is tunable in the 1.5-2.4 mu m range. By varying the input pulse energy, single and multiple filamentation regimes were accessed, as verified by the measurements of near field intensity distributions. Along with supercontinuum generation, efficient simultaneous generation of broadband second, third, and fourth harmonics is observed. We uncover that extremely efficient harmonics generation stems from randomly quasi phase matched three wave mixing processes, which are facilitated by filamentation of the input beam, as verified by the spectral and energy conversion dynamics, and by polarization measurements. Published by AIP Publishing.

引用

页数：4