Reduction of Interference Oscillations in Observing Intersubband Transitions in AlSb/GaSb Superlattices by Fourier Transform Infrared Spectroscopy
RU Guoping, LI Aizhen
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Metallurgy, Academia Sinica, Shanghai 200050
Reduction of Interference Oscillations in Observing Intersubband Transitions in AlSb/GaSb Superlattices by Fourier Transform Infrared Spectroscopy
RU Guoping;LI Aizhen
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Metallurgy, Academia Sinica, Shanghai 200050
关键词 ：
78.30.Fs ,
78.66.Fd ,
73.20.Dx
Abstract ： Intersubband transitions from L1 to L2 subbands in AISb/GaSb superlattices in the 8-18 μm wavelength range are observed by employing normal- and oblique-incident Fourier transform infrared (FTIR) spectroscopic techniques. Using AlSb rather than GaSb as the buffer layer, interference oscillations in normal-incident FTlR spectra are significantly reduced, which facilitates one to distinguish intersubband transition features. In the oblique-incident mode where a 45° thallium hexahedron is used for internal reflection, interference oscillations are eliminated, making it possible to observe weak intersubband transitions that cannot be distinguished in normal-incident absorption spectra.
Key words ：
78.30.Fs
78.66.Fd
73.20.Dx
出版日期: 1995-11-01
引用本文:
RU Guoping;LI Aizhen. Reduction of Interference Oscillations in Observing Intersubband Transitions in AlSb/GaSb Superlattices by Fourier Transform Infrared Spectroscopy
[J]. 中国物理快报, 1995, 12(11): 685-688.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1995/V12/I11/685
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