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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 1713–1725

Optical absorption enhancement of hybrid-plasmonic-based metal-semiconductor-metal photodetector incorporating metal nanogratings and embedded metal nanoparticles

Chee Leong Tan, Ayman Karar, Kamal Alameh, and Yong Tak Lee  »View Author Affiliations

Optics Express, Vol. 21, Issue 2, pp. 1713-1725 (2013)

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We propose and numerically demonstrate a high absorption hybrid-plasmonic-based metal semiconductor metal photodetector (MSM-PD) comprising metal nanogratings, a subwavelength slit and amorphous silicon or germanium embedded metal nanoparticles (NPs). Simulation results show that by optimizing the metal nanograting parameters, the subwavelength slit and the embedded metal NPs, a 1.3 order of magnitude increase in electric field is attained, leading to 28-fold absorption enhancement, in comparison with conventional MSM-PD structures. This is 3.5 times better than the absorption of surface plasmon polariton (SPP) based MSM-PD structures employing metal nanogratings and a subwavelength slit. This absorption enhancement is due to the ability of the embedded metal NPs to enhance their optical absorption and scattering properties through light-stimulated resonance aided by the conduction electrons of the NPs.

© 2013 OSA

OCIS Codes
(040.5160) Detectors : Photodetectors
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: October 10, 2012
Revised Manuscript: December 22, 2012
Manuscript Accepted: December 23, 2012
Published: January 16, 2013

Chee Leong Tan, Ayman Karar, Kamal Alameh, and Yong Tak Lee, "Optical absorption enhancement of hybrid-plasmonic-based metal-semiconductor-metal photodetector incorporating metal nanogratings and embedded metal nanoparticles," Opt. Express 21, 1713-1725 (2013)

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