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- Park, Jiho, et al.
(författare)
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Spin-Conserving Tunneling of Excitons in Diluted Magnetic Semiconductor Double Quantum Wells
- 2008
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Ingår i: Japanese Journal of Applied Physics. - 0021-4922 .- 1347-4065. ; 47, s. 3533-3536
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Tidskriftsartikel (refereegranskat)abstract
- Spin polarization in carrier tunneling was studied in double quantum wells by the polarized photoluminescence-excitation spectroscopy. The double quantum wells consist of a diluted magnetic quantum well of Zn0.77Cd0.15Mn0.08Se and a nonmagnetic quantum well of Zn0.82Cd0.18Se. Efficient spin-conserving tunneling of an exciton as an entity was observed from the nonmagnetic quantum well to the magnetic well. The spin-reversing tunneling was suppressed by two orders of magnitude in high magnetic field. The spin-conserving tunneling time was determined as 20 ps by time resolved photoluminescence measurement.
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