Influence of the p-type doping on the radiometric performances of MWIR InAs/GaSb superlattice photodiodes

被引:7
作者
Giard, E. [1 ]
Ribet-Mohamed, I. [1 ]
Delmas, M. [2 ,3 ]
Rodriguez, J. B. [2 ,3 ]
Christol, P. [2 ,3 ]
机构
[1] Off Natl Etud & Rech Aerosp, F-91761 Palaiseau, France
[2] Univ Montpellier, IES, UMR 5214, F-34000 Montpellier, France
[3] CNRS, IES, UMR 5214, F-34000 Montpellier, France
关键词
InAs/GaSb superlattice; Photodiode; Quantum efficiency;
D O I
10.1016/j.infrared.2014.07.034
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
In this paper, quantum efficiency (QE) measurements performed on type-II InAs/GaSb superlattice (T2SL) photodiodes operating in the mid-wavelength infrared domain, are reported. Several comparisons were made in order to determine the SL structure showing optimum radiometric performances: same InAsrich SL structure with different active zone thicknesses (from 0.5 mu m to 4 mu m) and different active zone doping (n-type versus p-type), same 1 mu m thick p-type active zone doping with different SL designs (InAs-rich versus GaSb-rich and symmetric SL structures). Best result was obtained for the p-type doped InAs-rich SL photodiode, with a 4 mu m active zone thickness, showing a QE that reaches 61% at lambda = 2 mu m and 0 V bias voltage. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:103 / 106
页数:4
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