TY - JOUR

T1 - Temperature Dependence of the Spectra of Optical Constants of CdTe in the Region of the Absorption Edge

AU - Shvets, V. A.

AU - Marin, D. V.

AU - Yakushev, M. V.

AU - Rykhiitskii, S. V.

N1 - This study was carried out under state assignment of the Ministry of Science and Higher Education of the Russian Federation (project no. 0242-2022-0002).

PY - 2024/4

Y1 - 2024/4

N2 - Abstract: In this work, the spectra of optical constants of epitaxial layers of cadmium telluride near the fundamental absorption edge are studied. For this purpose, ellipsometric measurements of the layers under study were carried out in a vacuum chamber in the temperature range from T = 38–275°C. A numerical algorithm has been developed for solving the inverse ellipsometry problem for the structures under consideration, with the help of which the spectral dependences of the refractive index n(λ) and absorption index k(λ) are determined in the wavelength range from 700 to 1000 nm. The parametric dependences of k(λ, T) in the fundamental absorption region and in the transparency region are presented. The presence of an extended absorption tail in the transparency region was established, presumably associated with imperfections in the crystal structure.

AB - Abstract: In this work, the spectra of optical constants of epitaxial layers of cadmium telluride near the fundamental absorption edge are studied. For this purpose, ellipsometric measurements of the layers under study were carried out in a vacuum chamber in the temperature range from T = 38–275°C. A numerical algorithm has been developed for solving the inverse ellipsometry problem for the structures under consideration, with the help of which the spectral dependences of the refractive index n(λ) and absorption index k(λ) are determined in the wavelength range from 700 to 1000 nm. The parametric dependences of k(λ, T) in the fundamental absorption region and in the transparency region are presented. The presence of an extended absorption tail in the transparency region was established, presumably associated with imperfections in the crystal structure.

KW - cadmium tellurium

KW - ellipsometry

KW - fundamental absorption edge

KW - spectra of optical constants

KW - temperature

UR - https://www.mendeley.com/catalogue/952a914c-d923-3a08-94b2-2af9c27df7a9/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85203559936&origin=inward&txGid=7d9a813050d3c9f39ad7b358fa790729

U2 - 10.1134/S0030400X24040143

DO - 10.1134/S0030400X24040143

M3 - Article

VL - 132

SP - 403

EP - 408

JO - Optics and Spectroscopy (English translation of Optika i Spektroskopiya)

JF - Optics and Spectroscopy (English translation of Optika i Spektroskopiya)

SN - 0030-400X

IS - 4

ER -