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Dilute magnetic semiconductor quantum-well structures for magnetic field tunable far-infrared/terahertz absorption

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6 Author(s)
I. Savic ; Sch. of Electron. & Electr. Eng., Univ. of Leeds, UK ; V. Milanovic ; Z. Ikonic ; D. Indjin
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The design of ZnCdSe-ZnMnSe-based quantum wells is considered, in order to obtain a large shift of the peak absorption wavelength in the far infrared range, due to a giant Zeeman splitting with magnetic field, while maintaining a reasonably large value of peak absorption. A triple quantum-well structure with a suitable choice of parameters has been found to satisfy such requirements. A maximal tuning range between 14.6 and 34.7 meV is obtained, when the magnetic field varies from zero to 5 T, so the wavelength of the absorbed radiation decreases from 85.2 to 35.7 μm with absorption up to 1.25% at low temperatures. These structures might form the basis for magnetic field tunable photodetectors and quantum cascade lasers in the terahertz range.

Published in:

IEEE Journal of Quantum Electronics  (Volume:40 ,  Issue: 11 )