CST – Computer Simulation Technology

A monolithically integrated plasmonic infrared quantum dot camera

Title:
A monolithically integrated plasmonic infrared quantum dot camera
Author(s):
Sang Jun Lee, Zahyun Ku, Ajit Barve, John Montoya, Woo-Yong Jang, S. R. J. Brueck, Mani Sundaram, Axel Reisinger, Sanjay Krishna, Sam Kyu Noh
Source:
Nature Communications
Vol./Issue/Date:
19 April 2011
Year:
2011
Page(s):
1-6
Abstract:
In the past few years, there has been increasing interest in surface plasmon-polaritons, as a result of the strong near-field enhancement of the electric fields at a metal–dielectric interface. Here we show the first demonstration of a monolithically integrated plasmonic focal plane array (FPA) in the mid-infrared region, using a metal with a two-dimensional hole array on top of an intersubband quantum-dots-in-a-well (DWELL) heterostructure FPA coupled to a read-out integrated circuit. Excellent infrared imagery was obtained with over a 160% increase in the ratio of the signal voltage (Vs) to the noise voltage (Vn) of the DWELL camera at the resonant wavelength of ? = 6.1 µm. This demonstration paves the way for the development of a new generation of pixel-level spectropolarimetric imagers, which will enable bio-inspired (for example, colour vision) infrared sensors with enhanced detectivity (D*) or higher operating temperatures.
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