An electrically-controllable multi-spectral quantum dot infrared photodetector with high photodetectivity

Xuejun Lu; Jarrod Vaillancourt; Mark J. Meisner

doi:10.1117/12.721265

14 May 2007 An electrically-controllable multi-spectral quantum dot infrared photodetector with high photodetectivity

Xuejun Lu, Jarrod Vaillancourt, Mark J. Meisner

Proceedings Volume 6542, Infrared Technology and Applications XXXIII; 65420Q (2007) https://doi.org/10.1117/12.721265
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

We present an electrically-controllable multi-spectral quantum dot infrared photodetector (QDIP). The QDIP consists of vertically-stacked InAs quantum dots layers with two different capping layers for MWIR and LWIR absorption, respectively. The multi-spectral QDOP is capable of simultaneously detecting multi-spectral normal incidence through inter-subband transitions in the three-dimensional (3-D) confined quantum dot nanostructures. The QDIP showed multi-color IR detection bands centered at 5.6μm, 7.7 μm and 10.0μm, respectively. By tuning the bias voltage, the detection band can be individual turned on. High photodetectivity of > 2.3×10¹⁰cmHz^1/2/W were obtained for these IR detection bands. The voltage-controllable detection band selection enables real-time system reconfiguration to focus on the band of interest. The vertically-stacked device structure allows easy construction of focal plane arrays (FPA).

Citation Download Citation

Xuejun Lu, Jarrod Vaillancourt, and Mark J. Meisner "An electrically-controllable multi-spectral quantum dot infrared photodetector with high photodetectivity", Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65420Q (14 May 2007); https://doi.org/10.1117/12.721265

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available