Strong intersubband absorption in EuTe/PbTe double-well superlattices at normal incidence

被引：5
|
作者：
Ishida, Akihiro
Veis, Martin
Inoue, Yoku
机构：
[1] Shizuoka Univ, Fac Engn, Dept Elect & Elect Engn, Hamamatsu, Shizuoka 4328561, Japan
[2] Shizuoka Univ, Grad Sch Elect Sci & Technol, Hamamatsu, Shizuoka 4328561, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2007年 / 46卷 / 12-16期
关键词：
intersubband absorption; IV-VI semiconductor; superlattice; quantum well; optical property;
D O I：
10.1143/JJAP.46.L281
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
EuTe/PbTe double-well superlattices with two kinds of PbTe quantum wells separated by monolayer EuTe were prepared on KCI(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 3x10(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 0.9cm(-1) K-1 caused by large temperature dependence of effective masses in PbTe.
引用
收藏
页码：L281 / L283
页数：3
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