ic8b01174_si_001.pdf (882.24 kB)
Prediction and Characterization of NaGaS2, A High Thermal Conductivity Mid-Infrared Nonlinear Optical Material for High-Power Laser Frequency Conversion
journal contribution
posted on 2018-06-15, 14:34 authored by Dianwei Hou, Arun S Nissimagoudar, Qiang Bian, Kui Wu, Shilie Pan, Wu Li, Zhihua YangInfrared nonlinear
optical (IR NLO) crystals are the major materials to widen the output
range of solid-state lasers to mid- or far-infrared regions. The IR
NLO crystals used in the middle IR region are still inadequate for
high-power laser applications because of deleterious thermal effects
(lensing and expansion), low laser-induced damage threshold, and two-photon
absorption. Herein, the unbiased global minimum search method was
used for the first time to search for IR NLO optical materials and
ultimately found a new IR NLO material NaGaS2. It meets
the stringent demands for IR NLO materials pumped by high-power laser
with the highest thermal conductivity among common IR NLO materials
able to avoid two-photon absorption, a classic nonlinear coefficient,
and wide infrared transparency.