The development of infrared (IR) nonlinear optical (NLO) crystals could foster their wide applications in civil and military fields. Thus, IR NLO materials with a band gap, high laser-induced damage threshold, lack two-photon absorption are urgently needed. This work reports the comprehensive properties LiAlS2 through systematic experimental characterizations first principle study. results conf...

The optical characteristics of birefringent materials transmitting in the near IR (0.9− 2.5 μm) are analyzed. Wollaston prisms with large beam separation and virtually free from lateral chromatism – e.g. with fields of view > 1 arcmin and image elongation < 0.3′′ – could be manufactured using AgGaS2 or LiYF4 (YLF). These materials are used for non linear applications and may therefore find anot...

In general, the growth of I-Ill-Vlz and If-1V-V2 chalcopyrite-type crystals of suitable quality for device applications has been difficult. In some cases, the problem lies in not being able to produce large single crystal specimens, while in others the quality of the crystal is not adequate for the purposes intended. Techniques for both material synthesis and crystal growth of chalcopyrite comp...

Commercially available infrared (IR) nonlinear optical (NLO) materials, such as diamond-like AgGaQ2 (Q = S, Se), display large NLO coefficients but relatively low laser-induced damage thresholds (LIDTs), which seriously hinder their widespread laser applications. Herein, the “one-for-multiple substitution” strategy, namely, [SZn46+ + 5Zn2+ ⇒ A+ 5Ga3+] (A K, Rb and Cs), is applied on zinc-blende...