Premium
Contribution of Excitons to the Optical Properties of GaSe
Author(s) -
Bianchi D.,
Emiliani U.,
Podini P.,
Paorici C.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220600205
Subject(s) - exciton , zeeman effect , interpretation (philosophy) , faraday effect , magnetic field , faraday cage , field (mathematics) , sample (material) , materials science , condensed matter physics , physics , optics , quantum mechanics , thermodynamics , computer science , mathematics , pure mathematics , programming language
Faraday effect measurements were performed on excitons in GaSe using a pulsed magnetic field up to 80 kG in synchronous operation. The interpretation of the experimental data showed the necessity of Zeeman splitting, magnetoabsorption and dichroism measurements. The analysis of the results suggested an analytical model taking into account the contribution of excitons to the optical constants of GaSe. Using this model the experimental data were successfully fitted. Such an approach is quite general and can be used every time one has well isolated resonances for which N ƒ ≪ (ϵ 0 μ γ ω 0 )/(2 π e 2 ). It is shown that this condition is satisfied for GaSe, for N ƒ = 1.06 × 10 17 cm −3 , g + = −3.5 is obtained while the damping factor γ changes from sample to sample between 3.6 × 10 12 and 4.5 × 10 12 s −1 .