Publications [#66842] of Adrienne D. Stiff-Roberts

Papers Published

1. Stiff-Roberts, A.D. and Chakrabarti, S. and Bhattacharya, P. and Kennerly, S., Tailoring of quantum dot infrared photodetector performance with AlAs/GaAs superlattice barriers, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, vol. 2 (2003), pp. 925 - 926, TUCSON, AZ, United States
   (last updated on 2007/04/16)

   Abstract:
   Quantum dot infrared photodetectors (QDIPs) offer normal-incidence sensitivity, low dark current, high-temperature operation, and multi-wavelength detection. In general, the advantages of these intersubband devices are the result of three-dimensional quantum dot (QD) electron confinement. It is found that the use of AlAs/Gaas SL barrier in an InAs QDIP heterostructure has led to significant gains in the control of detector performance, particularly in terms of obtaining high responsivity from these devices.

   Keywords:
   Semiconductor quantum dots;Superlattices;Semiconducting aluminum compounds;Semiconducting gallium arsenide;Heterojunctions;Band structure;Mathematical models;Ground state;Current density;Electron traps;Electron transitions;