Chapter 4. Optoelectronics and Advanced Lasers, Detectors and ImagersNo Access

HOT-ELECTRON TRANSPORT IN QUANTUM-DOT PHOTODETECTORS

L. H. CHIEN

EE Department, University at Buffalo, The State University of New York, 321 Bonner Hall, Buffalo, NY 14260, USA

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A. SERGEEV

EE Department, University at Buffalo, The State University of New York, 321 Bonner Hall, Buffalo, NY 14260, USA

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N. VAGIDOV

EE Department, University at Buffalo, The State University of New York, 312D Bonner Hall, Buffalo, NY 14260, USA

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, and

V. MITIN

EE Department, University at Buffalo, The State University of New York, 332 Bonner Hall, Buffalo, NY 14260, USA

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https://doi.org/10.1142/S0129156408005965Cited by:7 (Source: Crossref)

Abstract

Employing Monte-Carlo simulations we investigate effects of an electric field on electron kinetics and transport in quantum-dot structures with potential barriers created around dots via intentional or unintentional doping. Results of our simulations demonstrate that the photoelectron capture is substantially enhanced in strong electric fields and this process has an exponential character. Detailed analysis shows that effects of the electric field on electron capture in the structures with barriers are not sensitive to the redistribution of electrons between valleys and these effects are not related to an increase of drift velocity. Most data find adequate explanation in the model of hot-electron transport in the potential relief of quantum dots. Electron kinetics controllable by potential barriers and an electric field may provide significant improvements in the photoconductive gain, detectivity, and responsivity of photodetectors.

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References

M. Z. Tidrrow, Quantum Sensing and Nanophotonic Devices II, Proceed. SPIE 5732, eds. M. Razeghi and G. J. Brown (2005) p. 217. Google Scholar
A. Rogalski, Progress in Quantum Electronics 27, 59 (2003), DOI: 10.1016/S0079-6727(02)00024-1. Web of Science, Google Scholar
S. D. Gunapalaet al., Semicond. Sci. Technol. 20, 473 (2005), DOI: 10.1088/0268-1242/20/5/026. Web of Science, Google Scholar
B. F. Levine, J. Appl. Phys 74, R1 (1993), DOI: 10.1063/1.354252. Web of Science, Google Scholar
V. Ryzhii, Semicond. Sci. Technol. 11, 759 (1996), DOI: 10.1088/0268-1242/11/5/018. Web of Science, Google Scholar
P. Bhattacharyaet al., Appl. Phys. Lett. 86, 191106 (2005), DOI: 10.1063/1.1923766. Web of Science, Google Scholar
S. Tsaoet al., Appl. Phys. Lett 90, 201109 (2007), DOI: 10.1063/1.2740111. Web of Science, Google Scholar
H. Limet al., Appl. Phys. Lett. 90, 131112 (2007), DOI: 10.1063/1.2719160. Web of Science, Google Scholar
V. V. Mitinet al., Infrared Phys. and Technol. 42, 467 (2001), DOI: 10.1016/S1350-4495(01)00107-4. Web of Science, Google Scholar
V. Ryzhiiet al., Appl. Phys. Lett. 78, 3523 (2001), DOI: 10.1063/1.1376435. Web of Science, Google Scholar
A. Sergeev, V. Mitin and M. Stroscio, Physica B 317, 369 (2002). Google Scholar
V. Mitin, N. Vagidov and A. Sergeev, Phys. Stat. Sol. C 3, 4013 (2006), DOI: 10.1002/pssc.200671561. Google Scholar
N. Vagidov, A. Sergeev and V. Mitin, Int. J. High Speed Electronics and Systems 17, 585 (2007), DOI: 10.1142/S0129156407004783. Link, Google Scholar
H. Limet al., Phys. Rev. B 74, 205321 (2006), DOI: 10.1103/PhysRevB.74.205321. Web of Science, Google Scholar
M. Razeghiet al., Nanotechnology 16, 219 (2005), DOI: 10.1088/0957-4484/16/2/007. Web of Science, Google Scholar
J. Phillips, J. Appl. Phys. 91, 4590 (2002), DOI: 10.1063/1.1455130. Web of Science, Google Scholar
S. I. Pekar, Zh. Eksp.Teor. Fiz. 20, 267 (1950). Google Scholar
K. K. Ghosh, L.-H. Zhao and D. L. Huber, Phys. Rev. B 25, 3851 (1982), DOI: 10.1103/PhysRevB.25.3851. Web of Science, Google Scholar
M. R. Matthews, R. J. Steed and M. D. Frogley, Appl. Phys. Lett. 90, 103519 (2007), DOI: 10.1063/1.2712810. Web of Science, Google Scholar