Numerical study of near-infrared photodetectors with surface-plasmon antenna for optical communication

Daisuke Okamoto, Junichi Fujikata, Kenichi Nishi, Keishi Ohashi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We propose an InP-based nanoscale metal-semiconductor-metal photodiode with a surface plasmon antenna composed of gold slit arrays for optical communication systems. Resonant modes of the surface plasmon antenna are numerically simulated by the finite-difference time-domain method. The calculation results suggest the advantage of the hybrid mode, which is produced by a Wood-Rayleigh anomaly mode and a vertical cavity mode. The hybrid mode enables a quantum efficiency of more than 50% when using a 250-nm-thick InGaAs absorption layer. A higher efficiency of about 95% can be achieved by combining a surface plasmon antenna with a distributed Bragg reflector consisting of 20 periods of quarter-wave InP/InGaAsP layers.

Original languageEnglish
Pages (from-to)2921-2923
Number of pages3
JournalJapanese Journal of Applied Physics
Volume47
Issue number4 PART 2
DOIs
Publication statusPublished - 2008 Apr 25
Externally publishedYes

Fingerprint

Optical communication
Photodetectors
photometers
optical communication
antennas
Antennas
Infrared radiation
Distributed Bragg reflectors
Finite difference time domain method
Photodiodes
Metals
Quantum efficiency
Wood
Communication systems
Gold
Semiconductor materials
Bragg reflectors
finite difference time domain method
metals
photodiodes

Keywords

  • Compound semiconductor
  • Distributed bragg reflector
  • Finite-difference time-domain method
  • Metal-semiconductor-metal photodiode
  • Optical communication
  • Subwavelength grating
  • Surface plasmon

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Numerical study of near-infrared photodetectors with surface-plasmon antenna for optical communication. / Okamoto, Daisuke; Fujikata, Junichi; Nishi, Kenichi; Ohashi, Keishi.

In: Japanese Journal of Applied Physics, Vol. 47, No. 4 PART 2, 25.04.2008, p. 2921-2923.

Research output: Contribution to journalArticle

Okamoto, Daisuke ; Fujikata, Junichi ; Nishi, Kenichi ; Ohashi, Keishi. / Numerical study of near-infrared photodetectors with surface-plasmon antenna for optical communication. In: Japanese Journal of Applied Physics. 2008 ; Vol. 47, No. 4 PART 2. pp. 2921-2923.
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