Optimized design of plasmonic MSM photodetector

Jurana Hetterich, G. Bastian, N. A. Gippius, S. G. Tikhodeev, G. von Plessen, U. Lemmer

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

We present an optimized design for a plasmonic metal-semiconductor-metal photodetector with interdigitated electrodes with subwavelength dimensions and a single GaInNAs quantum well (QW) as an absorbing layer. The excitation of surface plasmons at the metal-semiconductor interface leads to a strong field enhancement near the metallic electrodes. This results in an increased absorption in the QW, allowing both fast electrical response of the photodetector and high quantum efficiencies. With a grating periodicity of 820 nm and electrode finger width of 460 nm a 16-fold increase in the absorption of p-polarized light in the QW is achieved in comparison to the case without electrodes.

Original languageEnglish
Pages (from-to)855-859
Number of pages5
JournalIEEE Journal of Quantum Electronics
Volume43
Issue number10
DOIs
Publication statusPublished - 2007
Externally publishedYes

Keywords

  • MSM photodetector
  • Polarization
  • Surface plasmons

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