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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 295–304

Plasmonic light harvesting for multicolor infrared thermal detection

Feilong Mao, Jinjin Xie, Shiyi Xiao, Susumu Komiyama, Wei Lu, Lei Zhou, and Zhenghua An  »View Author Affiliations


Optics Express, Vol. 21, Issue 1, pp. 295-304 (2013)
http://dx.doi.org/10.1364/OE.21.000295


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Abstract

Here we combined experiments and theory to study the optical properties of a plasmonic cavity consisting of a perforated metal film and a flat metal sheet separated by a semiconductor spacer. Three different types of optical modes are clearly identified—the propagating and localized surface plasmons on the perforated metal film and the Fabry-Perot modes inside the cavity. Interactions among them lead to a series of hybridized eigenmodes exhibiting excellent spectral tunability and spatially distinct field distributions, making the system particularly suitable for multicolor infrared light detections. As an example, we design a two-color detector protocol with calculated photon absorption efficiencies enhanced by more than 20 times at both colors, reaching ~42.8% at f1 = 20.0THz (15μm in wavelength) and ~46.2% at f2 = 29.5THz (~10.2μm) for a 1μm total thickness of sandwiched quantum wells.

© 2013 OSA

OCIS Codes
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Detectors

History
Original Manuscript: October 8, 2012
Revised Manuscript: November 19, 2012
Manuscript Accepted: November 19, 2012
Published: January 4, 2013

Citation
Feilong Mao, Jinjin Xie, Shiyi Xiao, Susumu Komiyama, Wei Lu, Lei Zhou, and Zhenghua An, "Plasmonic light harvesting for multicolor infrared thermal detection," Opt. Express 21, 295-304 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-1-295


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  34. In case of 45° edge facet incidence, the device responses only half of the unpolarized excitation due to the selection rule. For optimized polarization of the excitation, the simulated efficiencies reach ~4% for our QWs, which agree well with the previously reported values in Ref.[2].
  35. These enchancement factors increase at lower electron densities. For example, at Ns = 1 × 1011/cm2, the enhancement factors are ~55 at f1 (cavity: 23.0%; non-plasmonic: 0.84%; single-layer: 2.7%) and ~45 at f2 (cavity: 18.8%; non-plasmonic: 0.84%; single-layer: 0.3%).
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