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Comparison of Gain Properties with Electron--Electron and Electron--LO-Phonon Interactions in Quantum Cascade Structure |
| CHEN Gui-Chu1,2;FAN Guang-Han1 |
| 1Institute of Optoelectronic Material and Technology, South China Normal University, Guangdong 5106312Department of Physics, Zhao Qing University, Guangdong 526061 |
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| Cite this article: |
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CHEN Gui-Chu, FAN Guang-Han 2008 Chin. Phys. Lett. 25 1815-1817 |
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Abstract The gain properties of (AlN)m/(GaN)n superlattice-based quantum cascade structure are investigated by using a nonequilibrium Green's function (NGF) theory. In this theory, the electron--electron interaction and electron--LO-phonon interaction are both considered. The gain spectra of QCL are calculated from some current-driven items, which are derived from these two interactions. The results show that the effect of the electron--electron interaction is notable in the low-photon-energy range and the electron--LO-phonon interaction only takes effect in the high-photon-energy range, where photon energy is close to or larger than LO-phonon energy of GaN materials.
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| Keywords:
71.20.Nr
72.10.-d
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Received: 05 August 2007
Published: 29 April 2008
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| PACS: |
71.20.Nr
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(Semiconductor compounds)
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72.10.-d
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(Theory of electronic transport; scattering mechanisms)
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[1] Scamarcio G et al 1997 Appl. Phys. Lett. 701796
[2] Strasser G et al 1999 Appl. Phys. Lett. 751345
[3] Wacker A 2001 Advances in Solid State Physics edKramer B (Berlin: Springer) p 199
[4] Haug H and Jauho A P 1996 Quantum Kinetics inTransport and Optics of Semiconductors (Berlin: Springer)
[5] Lee S V and Wacker A 2002 Physica E 13 858
[6] Harrison P and Kelsall R W 1998 Solid StateElectron. 42 1449
[7] Ferreira R and Bastard G 1989 Phys. Rev. B 401074
[8] Wacker A 2002 Phys. Rev. B 66 085326
[9] Ishida A, et al. 2002 Jpn. J. Appl. Phys. 41L1303
[10] Pereira M F, Lee S C and Wacker A 2004 Phys. Rev. B 69 205310
[11] Sun G, et al. 2005 Superlattices and Microstructure 37 107 |
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