Strategic improvement of second and third harmonic generation in multifunctional Cu-Sn-S3 ternary semiconducting thin films

Acharya, Sudarshan B and Anusha, * and Antony, Albin and Aninamol, Ani and Kityk, I V and Ozga, K and Slezak, A and Jedryka, J and Poornesh, P and Manjunatha, K B and Acharya, Shashidhar (2019) Strategic improvement of second and third harmonic generation in multifunctional Cu-Sn-S3 ternary semiconducting thin films. Optics & Laser Technology, 120 (1). p. 105748. ISSN 0030-3992

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We propose a low-cost approach for the synthesis of multifunctional CuSnS3 (CTS) ternary compound thin film via spray pyrolysis technique. By varying Sn and S doping concentrations, a high energy absorber layers of CuSnS3 thin films were deposited on a glass substrate at a substrate temperature of 405°C. The prepared samples were analysed with respect to their optical, structural and electrical and nonlinear optical properties. X-Ray diffraction (XRD) analysis reveals that the films exhibit a tetragonal crystal structure with a preferential growth orientationalong(112).Thesurfacemorphologyofthe filmswasexploredbyatomicforcemicroscopy(AFM)in tapping mode configuration. Variation in the carrier charge density and electrical properties were observed for different Sn and S combination. The analysis of the Raman spectra indicates the presence of multiple phases apart from CuSnS3. The obtained Raman spectra were assigned to phonon mode as per zone centre phonon representation of optical and acoustic modes and identified to dominant “A” symmetry modes. The maximal laser stimulated induced second harmonic generation (SHG) signal was observed for the CTS 3 film and the corresponding second order non linear optical susceptibility which was equal to about 0.89pm/Vat1064nm and the minimal SHG signal was found for the CTS2 film(about 0.22pm/V). Thisstrategic improvementin SHGand third harmonic generation (THG) signal efficiency endorses the role of Sn and S in modulating second and third harmonic generations in CuSnS3 compound.

Item Type: Article
Uncontrolled Keywords: CuSnS3 thin films,Harmonic generation,Phonon modes,Electrical properties,Ternary semiconductors
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 17 Dec 2019 05:15
Last Modified: 17 Dec 2019 05:15

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