Physical, optical and nonlinear properties of InS single crystal
| Autor: | Achanta Venu Gopal, S. Ramakrishnan, Arumugam Thamizhavel, Chetan Gurada, S. S. Prabhu, E. Anjali, Harshad Surdi, Anuradha Patra, Pallavi Kushwaha, Abhishek Singh |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Condensed Matter - Materials Science
Materials science business.industry Band gap Organic Chemistry Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Physics::Optics Molecular physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry Crystal Optics Ellipsometry Orthorhombic crystal system Z-scan technique Electrical and Electronic Engineering Physical and Theoretical Chemistry business Absorption (electromagnetic radiation) Anisotropy Single crystal Spectroscopy |
| Popis: | 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 (010) oriented crystal exhibit low anisotropy in the 300-1000 nm wavelength range and consequently negligible THz emission 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 $\eta_2$ = $2.3 10^{-11} cm^2/W$ 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. Comment: 15 pages, 4 figures, 1 table |
| Databáze: | OpenAIRE |
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