Characterization and analysis of InGaAsSb detectors

M. Nurul Abedin; Tamer F. Refaat; Ravindra P. Joshi; Oleg V. Sulima; Michael G. Mauk; Upendra N. Singh

doi:10.1117/12.486345

10 October 2003 Characterization and analysis of InGaAsSb detectors

M. Nurul Abedin, Tamer F. Refaat, Ravindra P. Joshi, Oleg V. Sulima, Michael G. Mauk, Upendra N. Singh

Proceedings Volume 5074, Infrared Technology and Applications XXIX; (2003) https://doi.org/10.1117/12.486345
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

Profiling of atmospheric CO₂ at 2 μm wavelength using the LIDAR technique, has recently gained interest. Although several detectors might be suitable for this application, an ideal device would have high gain, low noise and narrow spectral response peaking around the wavelength of interest. This increases the detector signal-to-noise ratio and minimizes the background signal, thereby increasing the device sensitivity and dynamic range. Detectors meeting the above idealized criteria are commercially unavailable for this particular wavelength. In this paper, the characterization and analysis of Sb-based detectors for 2 μm lidar applications are presented. The detectors were manufactured by AstroPower, Inc., with an InGaAsSb absorbing layer and AlGaAsSb passivating layer. The characterization experiments included spectral response, current versus voltage and noise measurements. The effect of the detectors bias voltage and temperature on its performance, have been investigated as well. The detectors peak responsivity is located at the 2 μm wavelength. Comparing three detector samples, an optimization of the spectral response around the 2 μm wavelength, through a narrower spectral period was observed. Increasing the detector bias voltage enhances the device gain at the narrow spectral range, while cooling the device reduces the cut-off wavelength and lowers its noise. Noise-equivalent-power analysis results in a value as low as 4x10^-12 W/Hz^1/2 corresponding to D* of 1x10¹⁰ cmHz^1/2/W, at -1 V and 20°C. Discussions also include device operational physics and optimization guidelines, taking into account peculiarity of the Type II heterointerface and transport mechanisms under these conditions.

Citation Download Citation

M. Nurul Abedin, Tamer F. Refaat, Ravindra P. Joshi, Oleg V. Sulima, Michael G. Mauk, and Upendra N. Singh "Characterization and analysis of InGaAsSb detectors", Proc. SPIE 5074, Infrared Technology and Applications XXIX, (10 October 2003); https://doi.org/10.1117/12.486345

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