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Intersubband absorption with difference-frequency generation in GaAs asymmetric quantum wells |
Cao Xiao-Long (曹小龙)a c, Li Zhong-Yang (李忠洋)b, Yao Jian-Quan (姚建铨)a c, Wang Yu-Ye (王与烨)a c, Zhu Neng-Nian (朱能念)a c, Zhong Kai (钟凯)a b, Xu De-Gang (徐德刚 )a b |
a College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China; b Institute of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450011, China; c Key Laboratory of Opto-electronics Information Technology (Tianjin University), Ministry of Education, Tianjin 300072, China |
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Abstract An asymmetric quantum well (AQW) is designed to emit terahertz (THz) waves by using difference frequency generation (DFG) with the structure of GaAs/Al0.2Ga0.8As/Al0.5Ga0.5As. The characteristics of absorption coefficients are analysed under the parabolic and non-parabolic energy-band conditions in detail. We find that the absorption coefficients vary with the two pump optical intensities, and they reach the maxima when the pump wavelengths are given as λ p1=9.70 μm and λ p2=10.64 μm respectively. Compared with non-parabolic condition, the total absorption coefficient under parabolic condition shows a blue shift, which is due to the increase in the energy difference between the ground and excited states. By adjusting the two pump optical intensities, the wave vector phase-matching condition inside the AQW is satisfied.
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Received: 12 August 2011
Revised: 15 January 2012
Accepted manuscript online:
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PACS:
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42.50.Nn
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(Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)
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78.67.De
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(Quantum wells)
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42.65.-k
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(Nonlinear optics)
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61.72.uj
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(III-V and II-VI semiconductors)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60801017, 61172010, 61101058, and 61107086) and the Fund from the Science and Technology Committee of Tianjin, China (Grant No. 11JCYBJC01100). |
Corresponding Authors:
Cao Xiao-Long
E-mail: caoxiaolong63@126.com
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Cite this article:
Cao Xiao-Long (曹小龙), Li Zhong-Yang (李忠洋), Yao Jian-Quan (姚建铨), Wang Yu-Ye (王与烨), Zhu Neng-Nian (朱能念), Zhong Kai (钟凯), Xu De-Gang (徐德刚 ) Intersubband absorption with difference-frequency generation in GaAs asymmetric quantum wells 2012 Chin. Phys. B 21 084207
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[1] |
Johnson M B, Whittaker D M, Corchia A, Davies A G and Linfield E H 2002 Phys. Rev. B 65 165301
|
[2] |
Schmuttenmaer C A 2004 Chem. Rev. 104 1759b
|
[3] |
Xie X, Dai J and Zhang X C 2006 Phys. Rev. Lett. 96 075505
|
[4] |
Qi C C and Cheng Z H 2009 Chin. Phys. Lett. 26 064201
|
[5] |
Bahk Y M, Park H R, Ahn K J, Kim H S, Ahn Y H, Kim D S, Bravo-Abad J, Martin-Moreno L and Garcia-Vidal F J 2011 Phys. Rev. Lett. 106 013902
|
[6] |
Li J S and Li X J 2009 Acta Phys. Sin. 58 5805 (in Chinese)
|
[7] |
Apollonov V V, Shakir Y A and Gribenyukov A I 2002 J. Phys. D: Appl. Phys. 35 1477
|
[8] |
Molter D, Theuer M and Beigang R 2009 Opt. Express 17 6623
|
[9] |
Staus C M, Kuech T F and Caughan L M 2010 Opt. Express 18 2332
|
[10] |
Geng Y, Tan X, Li X and Yao J 2010 Appl. Phys. B: Laser Opt. 99 181
|
[11] |
Zhong K, Yao J Q, Xu D G, Zhang H Y and Wang P 2011 Acta Phys. Sin. 60 034210 (in Chinese)
|
[12] |
Sirtori C, Capasso F, Faist J, Pfeiffer L N and West K W 1994 Appl. Phys. Lett. 65 445
|
[13] |
Hiroshima T and Lang R, 1986 Appl. Phys. Lett. 49 456
|
[14] |
Dupont E, Wasilewski Z R and Liu H C. 2006 IEEE J. Electron. 42 1157
|
[15] |
Cao X L, Wang Y Y, Xu D G, Zhong K, Li J H, Li Z Y, Zhu N N and Yao J Q 2012 Chin. Phys. Lett. 29 014207
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