Optical Properties of Thermally Deposited Bismuth Telluride in the Wavelength Range of 2.5-10 µm

• Authors: A. Morsy , S. Fouad , E. Hashem , A. El-Shazly
• Languages of publication: EN

Abstracts

EN

The optical constants (the refractive index n, the absorption index k and the absorption coefficient α) of Bi_{2}Te_{3} thin films were determined in the wave-lenght range of 2.5 to 10 µm. The shape of the absorption edge in Bi_{2}Te_{3} thin films has been determined from transmittance and reflectance measurements. The edge is of the form expected for direct transition corresponding to E_{g} = 0.21 eV. The optical constants were used to determine the high frequency dielectric constant ε_{0} = 58, the optical conductivity σ =σ_{1} + σ_{2} as well as the volume and surface energy loss functions. All these parameters were used to get some information about the intraband and interband transitions.

Keywords

EN

78.65.-s; 81.40.Tv

Discipline

• 81.40.Tv: Optical and dielectric properties related to treatment conditions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 80
• Issue: 6
• Pages: 819-825

Dates

published

1991-12

received

1991-08-23

Contributors

author

A. Morsy

• Faculty of Education, Ain Shams University, Roxy, Egypt

author

S. Fouad

• Faculty of Education, Ain Shams University, Roxy, Egypt

author

E. Hashem

• Faculty of Girls, Ain Shams University, Roxy, Egypt

author

A. El-Shazly

• Faculty of Education, Ain Shams University, Roxy, Egypt

Identifiers

DOI

10.12693/APhysPolA.80.819