Band alignment in ZnSe/Zn{sub 1{minus}x{minus}y}Cd{sub x}Mn{sub y}Se quantum-well structures
- Department of Physics, State University New York at Buffalo, Buffalo, New York 14260 (United States)
- Naval Research Laboratory, Washington, D.C. 20375-5343 (United States)
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (United States)
We present a magneto-optical study of ZnSe/Zn{sub 1{minus}x{minus}y}Cd{sub x}Mn{sub y}Se quantum-well structures in which a suitable choice of the Cd composition leads to a system that is type I at zero magnetic field. When a magnetic field is applied perpendicular to the layers of the structure, the band edges split in such a way as to make the upper {bold {sigma}}{sub {minus}} (1/2, t 3/2) exciton transition type II, while the ground state {bold {sigma}}{sub +} ({minus}1/2, {minus}3/2) exciton component remains type I at all field values. This alignment reduces the probability for carrier relaxation from the higher-energy exciton component and opens the possibility of hole-spin population inversion via optical pumping. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 475291
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 55, Issue 3; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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