Original scientific paper
On the optical properties of vacuum-deposited selenium films
Siham Mahmoud
; Physics Department, National Research Centre, Cairo, U. A. R.
Abstract
In the present work, the direct transmission spectrum of selenium thin films deposited on different substrates has been measured at 300 K. The measurements were made using a Beckman double beam spectrophotometer IR 4220 and double beam UV-300 difference/dual wavelength spectrophotometer. The transmission data yielded the real (n) and imaginary (k) parts of the complex index of refraction, the imaginary (ε2) part of the complex dielectric constant and the absorption coefficient (α) over the energy range. All the observed shoulder have been interpreted in terms of transitions at symmetry points in K-space. Based on the observed transition energies, a band structure for selenium thin film is proposed and is compared with published theoretical calculations.
Keywords
Hrčak ID:
331137
URI
Publication date:
2.12.1986.
Visits: 452 *