Accession Number:

ADA582271

Title:

Analysis of Subwavelength Metal Hole Array Structure for the Enhancement of Back-Illuminated Quantum Dot Infrared Photodetectors

Descriptive Note:

Journal article

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH

Report Date:

2013-02-25

Pagination or Media Count:

9.0

Abstract:

This paper is focused on analyzing the impact of a two-dimensional metal hole array structure integrated to the back-illuminated quantum dots-in-a-well DWELL infrared photodetectors. The metal hole array consisting of subwavelength-circular holes penetrating gold layer 2D-Au-CHA provides the enhanced responsivity of DWELL infrared photodetector at certain wavelengths. The performance of 2D-Au-CHA is investigated by calculating the absorption of active layer in the DWELL structure using a finite integration technique. Simulation results show that the performance of the DWELL focal plane array FPA is improved by enhancing the coupling to active layer via local field engineering resulting from a surface plasmon polariton mode and a guided Fabry-Perot mode. Simulation method accomplished in this paper provides a generalized approach to optimize the design of any type of couplers integrated to infrared photodetectors. Experimental results demonstrate the enhanced signal-to-noise ratio by the 2D-Au-CHA integrated FPA as compared to the DWELL FPA. A comparison between the experiment and the simulation shows a good agreement.

Subject Categories:

  • Infrared Detection and Detectors
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE