A Caltech Library Service

Multispectral infrared detection using plasmon-assisted cavities

Shenoi, R. V. and Rosenberg, J. and Vandervelde, T. E. and Painter, O. J. and Krishna, S. (2009) Multispectral infrared detection using plasmon-assisted cavities. In: Infrared Technology and Applications XXXV. Proceedings of SPIE. No.7298. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 729808. ISBN 9780819475640.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We report the demonstration of multi-spectral quantum dots-in-a-well infrared photo-detectors through the coupling of incident light to resonant modes of surface plasmons. The integration of a surface plasmon assisted cavity with the detector results in shifting the peak wavelength of absorption of the detector to that of the resonant wavelength of the cavity. The cavity consists of a square lattice structure with square holes in it. A wavelength tuning of 8.5 to 9 μm was observed, by changing the pitch of the fabricated pattern forming the cavity. Polarization sensitive detectors can be fabricated by breaking the symmetry of the lattice. This is achieved by stretching the lattice constants along the x and y directions. A DWELL detector with resonant frequency at 6.8 μm where the response of the 0 ° polarization is twice as strong as the 90° polarization is reported. This technique, in principle, is detector agnostic and shows promise in fabrication of multi-spectral focal plane arrays (FPA).

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Vandervelde, T. E.0000-0003-3696-2765
Painter, O. J.0000-0002-1581-9209
Additional Information:© 2009 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was funded by AFOSR.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Subject Keywords:Quantum Dots, Infrared detector, Dots-in-a-Well Detector, Multi-spectral detection, Plasmons
Series Name:Proceedings of SPIE
Issue or Number:7298
Record Number:CaltechAUTHORS:20180530-114424999
Persistent URL:
Official Citation:R. V. Shenoi, J. Rosenberg, T. E Vandervelde, O. J. Painter, S. Krishna, "Multispectral infrared detection using plasmon-assisted cavities," Proc. SPIE 7298, Infrared Technology and Applications XXXV, 729808 (7 May 2009)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86715
Deposited By: George Porter
Deposited On:30 May 2018 23:17
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page