Properties of photoluminescence in type-II ZnMnSe/ZnSeTe multiple quantum wells

Lin, C. M.; Chen, Y. F.
September 2004
Applied Physics Letters;9/27/2004, Vol. 85 Issue 13, p2544
Academic Journal
The optical properties of type-II ZnMnSe/ZnSeTe multiple quantum wells were investigated by photoluminescence (PL) measurement. It was found that the peak position of PL spectra shows a giant blueshifl under a moderate optical excitation level. The giant blueshift can be interpreted in terms of the band-bending effect due to the spatially photoexcited carriers in a type-II alignment. We also found that the PL spectra exhibit a large in-plane polarization with respect to (110) axis with the polarization degree up to 12.4%. We showed that the polarization does not depend on the excitation intensity as well as temperature, which excludes the possibility of extrinsic mechanisms related to the in-plane anisotropy. The observed anisotropic effects of ZnMnSe/ZnSeTe multiple quantum wells were attributed to the intrinsic property of the orientation of chemical bonds at the heterointerface of the type-II hand alignment.


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