Thz Radiation under Tunneling in Asymmetric Double Quatum Wells
Menberu Mengesha, Svetlana Koshvaya, Vadim Mal’nev
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DOI: 10.4236/jemaa.2011.37044   PDF    HTML   XML   5,267 Downloads   9,056 Views   Citations

Abstract

The asymmetric parabolic double quantum wells (DQWs) with resonant levels (the ground state energy in one well co-incides with the first excited state energy in another well) is analyzed. The splitting of these levels and the tunneling times are calculated. If the typical life time of the excited state is much smaller than the tunneling time between wells, the charged particle can radiate as a result of the quantum transition from the excited state to the ground state. In the opposite case, the asymmetric DQWs can be treated as a metastable excited nanosystem regardless of that the dipole transition from the excited state to ground state is permitted. The lifetime of this metastable state can be considerably reduced by putting it into a resonant cavity. The possibility of coherent radiation of an ensemble of asymmetric DQWS is discussed.

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M. Mengesha, S. Koshvaya and V. Mal’nev, "Thz Radiation under Tunneling in Asymmetric Double Quatum Wells," Journal of Electromagnetic Analysis and Applications, Vol. 3 No. 7, 2011, pp. 271-276. doi: 10.4236/jemaa.2011.37044.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] M. Bedoya and A. S. Camacho, “Nonlinear Intersubband Absorption in Asymmetric Quantum Well Structures,” Physical Review B, Vol. 72, No. 155318, 2005, pp. 1-7.
[2] A. G. Davies, E. H. Linfield and M. B. Jonson, ‘The Development of Terahertz Sources and Their Application,” Physics in Medicine and Biology, Vol. 47, No. 7, 2002, pp. 3679-3689. doi:10.1088/0031-9155/47/21/302
[3] M. Razavy, “Quantum Theory of Tunneling,” 1st Edition, World Scientific Press, Hackensack, 2003.
[4] S. S. Rink, D. S. Chemla and D. A. B. Miller, “Linear and Nonlinear Optical Properties of Semiconductor Quantum Wells,” Advances in Physics, Vol. 38, No. 2, 1989, pp. 89-188. doi:10.1080/00018738900101102
[5] J. P. Einstein, L. N Pfei?er and K. W. West, “Independently Contacted Two Dimensional Electron Systems in Double Quantum Wells,” Journal of Applied Physics, Vol. 57, No. 2324, 1990.
[6] J. P. Einstein, L. N. Pfei?er and K. W. West, “Field-Induced Resonant Tunneling between Parallel two Dimensional Electron Systems,” Journal of Applied Physics, Vol. 58, No. 14, 1991, pp. 1497-1499.
[7] G. Sun, G. B. Xu, Y. J. J. Ding, H. P. Zhao, G. Y. Liu and J. Zhang, “Efficient Terahertz Generation with InGaN/GaN Multiple Quantum Wells,” IEEE Journal of Selected Topics in Quantum Electronics, Vol. 17, No. 1, 2011, pp. 48-53. doi:10.1109/JSTQE.2010.2049343
[8] J. R. Singer, “Masers,” John, Wiley, and Sons Inc, New York, 1959.
[9] J. Vanier and C. Audoin, “The Quantum Physics of Atomic Frequency Standards,” Adam Hilger, Bristol, 1989. doi:10.1887/085274434X
[10] C. S. Park, M. G. Jeong, D. K. Park and S. K. Yoo, “Double-Well Potential: The WKB Approxima tion with Phase Loss and Anharmonicity Effect,” Physical Review A, Vol. 58, No. 3443, 1998, pp. 1-14.
[11] D. Y. Song, “Tunneling and Energy Splitting in an Asymmetric Double Well Potential,” Annals of Physics, Vol. 323, No. 2991, 2008, pp. 1-14.
[12] D. Braun and J. Martin, “Spontaneous Emission from Two Level Atom in Double Well Potential,” Physical Review A, Vol. 77, No. 032102, 2008, pp. 1-10.
[13] E. Merzbacher, “Quantum Mechanics,” 3rd Edition, John Wiley and Sons press, New York, 1970.
[14] L. D. Landau and E. M. Liftshitz, “Quantum Mechanics,” 3rd Edition, Pergamon Press, London, 1977.
[15] D. Blokhintsev, “Quantum Mechanics,” 1st Edition, Springer Press, New York, 1964
[16] R. Reeder, Z. Ikonic, P. Harrison, A. Udal and E. Velmere, “Laterally Pumped GaAs/AlGaAs Quantum Wells as Sources of Broad Band Terahertz Radiation,” Journal of Applied Physics, Vol. 102, No. 7, 2007, Article ID: 073715. doi:10.1063/1.2783779
[17] S. A. Savinov and V. N. Mursin, “Energy Filtration Effect and the Posibility of the Generation of Terahertz Radiation in Resonant Tunneling Structures with Several Quantum Wells,” JEEP Letters, Vol. 93, No. 1, 2011, pp. 155-160.
[18] E. C. Niculescu and A. Radu, “Tunneling Time Correction to the Intersubband Optical Absorption in a THz Laser-Dressed GaAs/AlxGa1-xAs Quantum Well,” European Physical Journal B, Vol. 80, No. 1, 2011, pp. 73-82. doi:10.1140/epjb/e2011-10707-0

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