Giant polarized optical properties in type-II ZnTe/CdSe multiple quantum wells induced by interface chemical bonds
Journal
Physica Status Solidi (B) Basic Research
Journal Volume
241
Journal Issue
3
Pages
538-541
Date Issued
2004
Author(s)
Abstract
Abstract Photoluminescence (PL) and photoconductivity (PC) spectra were studied in type‐II ZnTe/CdSe multiple quantum wells. It was found that the PL spectrum exhibits a strong in‐plane polarization with respect to 〈011〉 axis with polarization degree up to 30%. The degree of polarization does not depend on the excitation intensity and temperature, which excludes extrinsic mechanisms related to the observed in‐plane anisotropy. The underlying mechanism of the observed polarization dependence of the optical properties was attributed to the inherent property of the orientation of chemical bonds in ZnTe/CdSe heterostructures with no common atom. In addition, the PC spectra also display a strong polarization dependence. We therefore point out that polarized PL and PC spectroscopies provide a unique way to probe the effects of the orientation of interface chemical bonds on semiconductor heterostructures. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Type
journal article