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Structural and optical properties of thin CdTe films in the visible and infrared regions
V.V. Podlipnov 1,2, D.A. Bykov 1,2, D.V. Nesterenko 1,2

1 IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS,
443001, Samara, Russia, Molodogvardeyskaya 151;
2 Samara National Research University, 443086, Samara, Russia, Moskovskoye Shosse 34

 PDF, 2060 kB

DOI: 10.18287/2412-6179-CO-1042

Pages: 415-421.

Full text of article: Russian language.

Abstract:
CdTe thin films have been deposited by thermal evaporation on heated glass substrates. Structural properties of the CdTe thin films were studied by scanning electron microscopy and Raman spectroscopy. Optical properties were examined by ellipsometry and Fourier spectroscopy. We revealed the low absorption of the synthesized thin films in the infrared (IR) region. We investigated the sensing capability of metal / dielectric / dielectric structures based on a CdTe waveguide layer and gold thick film. The reflectivity spectra of the structures with the water, ethanol, and isopropanol as sensing media exhibit resonance line shapes. The positions of the resonances correspond to those of local maximal values of the solvents absorption. The obtained results can be used for developing the applications of optical resonances in the IR region.

Keywords:
nanophotonics, metal-dielectric structures, resonances, sensing, CdTe thin films, chalcogenide glassy semiconductors, spectroscopy.

Citation:
Podlipnov VV, Bykov DA, Nesterenko DV. Structural and optical properties of thin CdTe films in the visible and infrared regions. Computer Optics 2022; 46(3): 415-421. DOI: 10.18287/2412-6179-CO-1042.

Acknowledgements:
The work was partly funded by the Russian Federation Ministry of Science and Higher Education within a state contract with the "Crystallography and Photonics" Research Center of the RAS under agreement 007-ГЗ/Ч3363/26 (sections 2.1, 2.2) and Russian Foundation for Basic Research under project No. 18-29-20006 (sections 1, 2.3).

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