IrSi 3 As 3 : a first transition metal arsenide non-linear optical material
IrSi 3 As 3 : a first transition metal arsenide non-linear optical material
复制标题
IrSi 3 As 3 ：第一种过渡金属砷化物非线性光学材料
DOI：
10.1039/d2ta09313h
复制
发表时间：
2023
影响因子：
11.9
通讯作者：
Kovnir, Kirill
中科院分区：
文献类型：
--
作者：
Lee, Shannon J.;Akopov, Georgiy;Adeyemi, Adedoyin N.;Soto, Ernesto;Wu, Kui;Kovnir, Kirill
非中心对称（NCS）磷化硅由于具有较强的二次谐波产生（SHG）活性和较大的激光损伤阈值（LDT），近年来被广泛用作非线性光学材料。虽然研究了正电性金属如Ba、Mg、Zn和Cd的砷化物，但尚未报道过渡金属四元砷化物的NLO性质。IrSi3As3是一种新型化合物，与IrSi3P3同构，这允许直接研究较重的氮族元素对结构和光学性质的影响。直接带隙从IrSi3P3的1.8 eV减小到IrSi3As3的1.55 eV。与许多NLO硫属化物不同，IrSi3As3具有小的带隙，而不会影响SHG信号和高LDT值之间的平衡。发现IrSi3As3在SHG活性和LDT方面优于其磷化物类似物IrSi3P3以及最先进的红外SHG标准AgGaS2（AGS）。
Noncentrosymmetric (NCS) silicon phosphides have recently shown promise as nonlinear optical materials due to the balance of strong second harmonic generation (SHG) activity and large laser damage threshold (LDT) values. While arsenides of electropositive metals, such as Ba, Mg, Zn, and Cd were explored, no NLO properties for transition metal tetrel arsenides have yet been reported. IrSi3As3 is a novel compound, isostructural to IrSi3P3, which allows a direct investigation on the impact of the heavier pnictogen on structural and optical properties. The direct bandgap is reduced from 1.8 eV for IrSi3P3 to 1.55 eV for IrSi3As3. Unlike many NLO chalcogenides, IrSi3As3 has a small bandgap without compromising the balance between SHG signal and high LDT values. IrSi3As3 was found to outperform both its phosphide analogue IrSi3P3, as well as the state-of-the-art infrared SHG standard AgGaS2 (AGS) in SHG activity and the LDT.