Modeling of hybridized infrared arrays for characterization of interpixel capacitive coupling

Kevan Donlon; Zoran Ninkov; Stefi Baum; Linpeng Cheng

doi:10.1117/1.OE.56.2.024103

Abstract

Interpixel capacitance (IPC) is a deterministic electronic coupling resulting in a portion of signal incident on one pixel of a hybridized detector array being measured in adjacent pixels. Data collected by light sensitive HgCdTe arrays that exhibit this coupling typically goes uncorrected or is corrected by treating the coupling as a fixed point spread function. Evidence suggests that this coupling is not uniform across signal and background levels. Subarrays of pixels using design parameters based upon HgCdTe indium hybridized arrays akin to those contained in the James Webb Space Telescope’s NIRcam have been modeled from first principles using Lumerical DEVICE Software. This software simultaneously solves Poisson’s equation and the drift diffusion equations yielding charge distributions and electric fields. Modeling of this sort generates the local point spread function across a range of detector parameters. This results in predictive characterization of IPC across scene and device parameters that would permit proper photometric correction and signal restoration to the data. Additionally, the ability to visualize potential distributions and couplings as generated by the models yields insight that can be used to minimize IPC coupling in the design of future detectors.

Citation Download Citation

Kevan Donlon, Zoran Ninkov, Stefi Baum, Linpeng Cheng, "Modeling of hybridized infrared arrays for characterization of interpixel capacitive coupling," Optical Engineering 56(2), 024103 (7 February 2017). https://doi.org/10.1117/1.OE.56.2.024103 . Submission: Received: 30 October 2016; Accepted: 19 January 2017

Received: 30 October 2016; Accepted: 19 January 2017; Published: 7 February 2017

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

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

Members: $20.00

Non-members: $25.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years