Electron and hole tunneling transfer processes in asymmetric double quantum well structures are investigated by time-resolved picosecond photoluminescence. Change from nonresonant to resonant tunneling is achieved with a perpendicular electric field. Electron transfer times become considerably faste
Dynamics of resonant and non-resonant tunneling in asymmetric coupled quantum wells
✍ Scribed by H. Cruz; A. Muñoz
- Book ID
- 104735570
- Publisher
- Springer
- Year
- 1993
- Tongue
- English
- Weight
- 306 KB
- Volume
- 56
- Category
- Article
- ISSN
- 1432-0630
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✦ Synopsis
Within the framework of the effective mass approximation, coherent oscillations of a photoexcited electron wave packet in an asymmetric coupled quantum well structure have been studied using a time-dependent Schrtidinger equation. In the method of calculation, the continuity of the current across a semiconductor heterojunction is considered. The amplitude and period of the electronic is obtained and in the case of high bias, it is found the existence of electric field-induced tunelling to semiconductor bulk.
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Electronic Bragg mirrors were used to conÿne carriers at energy levels above the barrier height in asymmetric coupled quantum wells. Two classes of above barrier states were resolved by using photoluminescence, photoluminescence excitation and modulated resonant Raman spectroscopy. The ÿrst class is
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