Strong Responsivity Enhancement of Quantum Dot‐in‐a‐Well Infrared Photodetectors Using Plasmonic Structures
Abstract
Detector responsivity enhancement from integrating optimized plasmonic structure layers into quantum dot‐in‐a‐well photodetectors is investigated by a finite integration technique‐based simulation. It is found that by including a 0.1 µm thick gold hole‐array layer onto a backside illuminated photodetector, the peak detector responsivity is enhanced by nearly a factor of 8. A 0.2 µm thick gold disk‐array layer improves the peak responsivity by around 15 instead. The calculated enhancement factors show a good agreement with experimental data by Gu et al.[1] and Lee et al.[2] Simulation method and analytical analysis accomplished in this paper provide a generalized approach to design optimal plasmonic structures integrated to various infrared detecting device configurations.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 28, 2018
- Source ID
- 10.1002/adts.201800143
Entities
People
- Augustine Urbas
- Clayton Fowler
- Jiangfeng Zhou
- Jun Oh Kim
- Sang Jun Lee
- Zahyun Ku
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- Alfred P. Sloan Foundation
- Korea Research Institute of Standards and Science
- National Research Foundation of Korea
- University of South Florida