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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 17 — Aug. 15, 2011
  • pp: 15843–15854

Theoretical investigation of silicide Schottky barrier detector integrated in horizontal metal-insulator-silicon-insulator-metal nanoplasmonic slot waveguide

Shiyang Zhu, G. Q. Lo, and D. L. Kwong  »View Author Affiliations


Optics Express, Vol. 19, Issue 17, pp. 15843-15854 (2011)
http://dx.doi.org/10.1364/OE.19.015843


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Abstract

An ultracompact integrated silicide Schottky barrier detector (SBD) is designed and theoretically investigated to electrically detect the surface plasmon polariton (SPP) propagating along horizontal metal-insulator-silicon-insulator-metal nanoplasmonic slot waveguides at the telecommunication wavelength of 1550 nm. An ultrathin silicide layer inserted between the silicon core and the insulator, which can be fabricated precisely using the well-developed self-aligned silicide process, absorbs the SPP power effectively if a suitable silicide is chosen. Moreover, the Schottky barrier height in the silicide-silicon-silicide configuration can be tuned substantially by the external voltage through the Schottky effect owing to the very narrow silicon core. For a TaSi2 detector with optimized dimensions, numerical simulation predicts responsivity of ~0.07 A/W, speed of ~60 GHz, dark current of ~66 nA at room temperature, and minimum detectable power of ~-29 dBm. The design also suggests that the device’s size can be reduced and the overall performances will be further improved if a silicide with smaller permittivity is used.

© 2011 OSA

OCIS Codes
(230.0040) Optical devices : Detectors
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Detectors

History
Original Manuscript: May 5, 2011
Revised Manuscript: July 6, 2011
Manuscript Accepted: July 13, 2011
Published: August 4, 2011

Citation
Shiyang Zhu, G. Q. Lo, and D. L. Kwong, "Theoretical investigation of silicide Schottky barrier detector integrated in horizontal metal-insulator-silicon-insulator-metal nanoplasmonic slot waveguide," Opt. Express 19, 15843-15854 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-17-15843


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