Characterization of the In0.53Ga0.47As n+nn+ Photodetectors

Authors: Fatima Zohra Mahi, Luca Varani

Abstract:

We present an analytical model for the calculation of the sensitivity, the spectral current noise and the detective parameter for an optically illuminated In0.53Ga0.47As n+nn+ diode. The photocurrent due to the excess carrier is obtained by solving the continuity equation. Moreover, the current noise level is evaluated at room temperature and under a constant voltage applied between the diode terminals. The analytical calculation of the current noise in the n+nn+ structure is developed by considering the free carries fluctuations. The responsivity and the detection parameter are discussed as functions of the doping concentrations and the emitter layer thickness in one-dimensional homogeneous n+nn+ structure.

Keywords: Responsivity, detection parameter, photo-detectors, continuity equation, current noise.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1337873

References:

[1] D. D. Coon, R. P. Devaty, A. G. U. Perera and R. E. Sherriff, Journal of Applied Physics Letter, vol. 55, 1989, 1738.
[2] A. G. U. Perera, R. E. Sherriff, M. H. Francombe, R. P. Devaty, Journal of Applied Physics Letter, vol. 60, 1992, 552.
[3] C. Balocco and al., Journal of Applied Physics Letter, 98, 2011, pp. 223501.
[4] Nibir K. Dhar, Ravi Dat and Ashok K. Sood, Optoelectronics-Advanced Materials and Devices, 2013, DOi: (10.5772/51665).
[5] F. Z. Mahi and L. Varani, IEEE proceedings 22nd Int.Conf. On Noise and Fluctuations, 24-28 June Montpellier, 2013, DOi: (10.1109/ICNF.2013.6578930).
[6] F. Z. Mahi, A. Helmaoui, L. Varani, C. Palermo, P. Shiktorov, E. Starikov and V. Gruzhinskis, Fluctuations and Noise Letter, 2011, vol. 121.
[7] B. K. Mishra, L. Jolly, S. C. Patil, “In1-xGaxAs next generation material for photodetectors”, Journal of Selected Areas in Microelectronics (JSAM), April Edition, 2011.
[8] F. Z. Mahi, A. Helmaoui, L. Varani, P. Shiktorov, E. Starikov and V. Gruzhinskis, Physica B, vol. 403, 2008, 3765768.
[9] L. Reggiani, P. Golinelli, E. Faucher, L. Varani, T. Gonzalez and D. Pardo, Proc. 13th International Conference on Noise in physical systems and 1/f fluctuations, Eds. V. Bareikis and R. Katilius. World Scientific Singapore, 1995, 163.
[10] F. Z. Mahi and L. Varani, Results in Physics, Published by Elsevier 3, 2013, 209.