Strong Intersubband Absorption in EuTe/PbTe Double-Well Superlattices at Normal Incidence
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概要
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EuTe/PbTe double-well superlattices with two kinds of PbTe quantum wells separated by monolayer EuTe were prepared on KCl(100) substrates by hot wall epitaxy. Strong intersubband absorptions as high as 2000 cm-1 in absorption coefficient were observed for n-type samples with a carrier concentration as high as $3\times 10^{18}$ cm-3 at normal incidence. The absorption was caused through the modulation of quantum-well potential along superlattice direction at L-point of the Brillouin zone. Temperature dependence of the optical transmission properties was also measured and the absorption peak showed a large tunability of 0.9 cm-1 K-1 caused by large temperature dependence of effective masses in PbTe.
- 2007-04-25
著者
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Inoue Yoku
Department Of Electrical And Electronic Engineering Faculty Of Engineering Shizuoka University
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Ishida Akihiro
Department Of Applied Physics The National Defense Academy
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Veis Martin
Graduate School Of Electronic Science And Technology Shizuoka University
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Ishida Akihiro
Department of Electrical and Electronic Engineering, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
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Inoue Yoku
Department of Electrical and Electronic Engineering, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
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Veis Martin
Graduate School of Electronic Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
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