Abstract
Fourier-transformed photoreflectance and photoluminescence have been used to study the optical transitions in type 11 quantum wells (QWs) ranging up to almost 5 mu m. High signal-to-noise ratio spectral features resulting from fundamental and excited state transitions have been detected for molecular beam epitaxially grown GaSb/AlSb/InAs/InGaSb/InAs/AlSb/GaSb "W"-shaped QW structures designed for laser-based gas sensing applications in the mid-infrared. The spectral features' dependence on arsenic pressure during growth process and on InAs confining-layer thickness could be followed unambiguously at room temperature. (C) 2009 The Japan Society of Applied Physics DOI: 10.1143/APEX.2.126505
Original language | English |
---|---|
Article number | 126505 |
Number of pages | 3 |
Journal | Applied Physics Express |
Volume | 2 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2009 |
Keywords
- TRANSITIONS