About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Surface Science
Paper
Spectroscopic studies of strained-layer GaSbAlSb superlattices
Abstract
Photoreflectance (PR) and photoluminescence (PL) studies of GaSbAlSb multiple quantum well structures under hydrostatic pressure at cryogenic temperatures are presented. A large number of excitonic transitions from the conduction sub-hands (CB) to the light (LH) and heavy (HH) hole sub-bands are observed in PR. In contrast, the ground sub-band transition from the CB to the LH dominates the PL. The pressure coefficients get progressively smaller for the higher sub-band transitions. The PL intensity drops dramatically as the direct Γ CB crosses the L CB at ∼ 10 kbar but the PR intensity does not. However a large drop in PR signal is observed as the X CB crosses each sub-band energy. © 1990.