Physical, optical and nonlinear properties of InS single crystal
Physical, optical and nonlinear properties of InS single crystal
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DOI：
10.1016/j.optmat.2013.10.046
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发表时间：
2014-01-01
影响因子：
3.9
通讯作者：
Thamizhavel, A.
中科院分区：
文献类型：
--
作者：
Kushwaha, Pallavi;Patra, Anuradha;Thamizhavel, A.
Indium Sulphide (InS) single crystals are successfully grown by In flux. Single crystal X-ray diffraction shows orthorhombic structure of Pnnm space group. Ellipsometry measurements performed on the (0 1 0) oriented crystal exhibit low anisotropy in the 300-1000 nm wavelength range and consequently negligible THz transmission is observed. Optical band gap of 2.09 eV is deduced from linear optical measurements. Nonlinear optical properties are studied by single beam Z-scan measurements at 800 nm, where two-photon absorption is present. Nonlinear refractive index and absorption coefficient are estimated to be n(2)= 2.3 x 10(-11) cm(2)/W and beta = 62.4 cm/GW, respectively for excitation intensity of 0.32 GW/cm(2). The origin of nonlinearity in InS crystal is accounted to be due to the third-order anharmonic motion of the bound electrons. (C) 2013 Elsevier B.V. All rights reserved.
