Demonstration of a two-color 320&times;256 quantum dots-in-a-well focal plane array

Eric S. Varley; David Ramirez; Jay S. Brown; Sang Jun Lee; Andreas Stintz; Michael Lenz; Sanjay Krishna; Axel Reisinger; Mani Sundaram

doi:10.1117/12.732566

26 September 2007 Demonstration of a two-color 320×256 quantum dots-in-a-well focal plane array

Eric S. Varley, David Ramirez, Jay S. Brown, Sang Jun Lee, Andreas Stintz, Michael Lenz, Sanjay Krishna, Axel Reisinger, Mani Sundaram

Author Affiliations +

Proceedings Volume 6678, Infrared Spaceborne Remote Sensing and Instrumentation XV; 66780T (2007) https://doi.org/10.1117/12.732566
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

In our research group, we develop novel dots-in-a-well (DWELL) photodetectors that are a hybrid of the quantum dot infrared photodetector (QDIP). The DWELL detector consists of an active region composed of InAs quantum dots embedded in InGaAs quantum wells. By adjusting the InGaAs well thickness, our structure allows for the manipulation of the operating wavelength and the nature of the transitions (bound-to-bound, bound-to-quasibound and bound-to-continuum) of the detector. Based on these principles, DWELL samples were grown using molecular beam epitaxy and fabricated into 320 x 256 focal plane arrays (FPAs) with Indium bumps using standard lithography at the University of New Mexico. The FPA evaluated was hybridized to an Indigo 9705 readout integrated circuit (ROIC) in collaboration with QmagiQ LLC and tested with a CamIRa^TM system manufactured by SE-IR Corp. From this evaluation, we report the first two-color, co-located quantum dot based imaging system that can be used to take multicolor images using a single FPA. We demonstrated that we can operate the device at an intermediate bias (V_b=-1.25 V) and obtain two color response from the FPA at 77K. Using filter lenses, both MWIR and LWIR responses were obtained from the array at the same bias voltage. The MWIR and LWIR responses are thought to be from bound states in the dot to higher and lower lying states in the quantum well respectively. Temporal NEDT for the DWELL FPA was measured to be 80mK at 77K.

Citation Download Citation

Eric S. Varley, David Ramirez, Jay S. Brown, Sang Jun Lee, Andreas Stintz, Michael Lenz, Sanjay Krishna, Axel Reisinger, and Mani Sundaram "Demonstration of a two-color 320×256 quantum dots-in-a-well focal plane array", Proc. SPIE 6678, Infrared Spaceborne Remote Sensing and Instrumentation XV, 66780T (26 September 2007); https://doi.org/10.1117/12.732566

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