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Proceedings Paper

Optimal design of resonant enhanced quantum dot infrared photodetector based on metal-insulator-metal microcavity
Author(s): Han Wang; Youliang Jing; Mengyao Li; Liang Li; Honglou Zhen
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Paper Abstract

The design of quantum dot infrared photodetector (QDIP) based on metal-insulator-metal (MIM) microcavity in which the quantum dot (QD) is sandwiched between a planar metallic film and a metallic stripe is reported. By a finite difference time-domain (FDTD) method, the light coupling efficiency spectra and enhancement factor are numerically calculated. The results exhibit that the total electric field concentrated in metal-metal region is strongly enhanced when the resonant frequency of microcavity is equal to the QD’s peak response frequency. This enhancement effect mainly originates from the resonant coupling of incident photons into microcavity forming the surface plasmonic mode. The optimization of structural parameters for MIM microcavity is discussed, demonstrating an optimal structure of quantum dot infrared photodetector with the coupling efficiency improved nearly 7 times compared with conventional mesa QDIPs. So, it is deduced that a favorable performance of device such as high quantum efficiency and infrared responsivity is possible. Finally, the detector shows the potential application in the infrared sensing and imaging, as well as integrating with other electronic and optoelectronic device for the sub-wavelength size.

Paper Details

Date Published: 5 November 2015
PDF: 6 pages
Proc. SPIE 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015, 97951M (5 November 2015); doi: 10.1117/12.2216044
Show Author Affiliations
Han Wang, Shanghai Institute of Technical Physics (China)
Youliang Jing, Shanghai Institute of Technical Physics (China)
Mengyao Li, Shanghai Institute of Technical Physics (China)
Liang Li, Shanghai Institute of Technical Physics (China)
Honglou Zhen, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 9795:
Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015
Shenggang Liu; Songlin Zhuang; Michael I. Petelin; Libin Xiang, Editor(s)

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