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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 11 — May. 21, 2012
  • pp: 12599–12609

Critically coupled silicon Fabry-Perot photodetectors based on the internal photoemission effect at 1550 nm

Maurizio Casalino, Giuseppe Coppola, Mario Iodice, Ivo Rendina, and Luigi Sirleto  »View Author Affiliations


Optics Express, Vol. 20, Issue 11, pp. 12599-12609 (2012)
http://dx.doi.org/10.1364/OE.20.012599


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Abstract

In this paper, design, fabrication and characterization of an all-silicon photodetector (PD) at 1550 nm, have been reported. Our device is a surface-illuminated PD constituted by a Fabry-Perot microcavity incorporating a Cu/p-Si Schottky diode. Its absorption mechanism, based on the internal photoemission effect (IPE), has been enhanced by critical coupling condition. Our experimental findings prove a peak responsivity of 0.063 mA/W, which is the highest value obtained in a surface-illuminated IPE-based Si PD around 1550 nm. Finally, device capacitance measurements have been carried out demonstrating a capacitance < 5 pF which has the potential for GHz operation subject to a reduction of the series resistance of the ohmic contact.

© 2012 OSA

OCIS Codes
(040.0040) Detectors : Detectors
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(040.6040) Detectors : Silicon
(250.0250) Optoelectronics : Optoelectronics
(260.5740) Physical optics : Resonance

ToC Category:
Detectors

History
Original Manuscript: January 31, 2012
Revised Manuscript: April 13, 2012
Manuscript Accepted: April 26, 2012
Published: May 18, 2012

Citation
Maurizio Casalino, Giuseppe Coppola, Mario Iodice, Ivo Rendina, and Luigi Sirleto, "Critically coupled silicon Fabry-Perot photodetectors based on the internal photoemission effect at 1550 nm," Opt. Express 20, 12599-12609 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-11-12599


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