Title :
Demonstration of a Novel Mid Infrared Device: The Quantum-Dot Avalanche Photodiode (QDAP)
Author :
Shao, Jiayi ; Attaluri, R.S. ; Stintz, A. ; Brown, J.S. ; Hayat, Majeed M. ; Krishna, Sanjay
Author_Institution :
ECE Dept., New Mexico Univ., Albuquerque, NM
Abstract :
In this paper we demonstrate an intersubband quantum dot detector coupled to an avalanche photodiode to improve the signal-to-noise ratio and increase the operating temperature of the device. Mid-infrared photodetectors, operating in the 50-400 meV (3-25 mum) regime, have a variety of potential applications in medical diagnostics, thermal imaging, night vision cameras for battlefield recognition systems, and chip-based detection of chemical warfare agents. Intersubband quantum dot detectors have been proposed as a promising technology due to their normal incidence excitation and lower dark currents. However, the low quantum efficiency leads to a lower detectivity, responsivity and limits their operating temperature to about 70-80 K
Keywords :
avalanche photodiodes; infrared detectors; night vision; photodetectors; quantum dots; 3 to 25 micron; 50 to 400 meV; 70 to 80 K; QDAP; battlefield recognition system; chemical warfare agent; chip-based detection; intersubband quantum dot detector; lower dark current; medical diagnostics; night vision camera; normal incidence excitation; novel mid infrared photodetector; operating temperature; quantum-dot avalanche photodiode; thermal imaging; Avalanche photodiodes; Cameras; Detectors; Medical diagnosis; Medical signal detection; Night vision; Photodetectors; Quantum dots; Signal to noise ratio; Temperature;
Conference_Titel :
Lasers and Electro-Optics Society, 2006. LEOS 2006. 19th Annual Meeting of the IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-9555-7
Electronic_ISBN :
0-7803-9555-7
DOI :
10.1109/LEOS.2006.278882
