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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 3 — Jan. 30, 2012
  • pp: 2649–2656

Nanoantenna coupled UV subwavelength photodetectors based on GaN

Serkan Butun, Neval A. Cinel, and Ekmel Ozbay  »View Author Affiliations


Optics Express, Vol. 20, Issue 3, pp. 2649-2656 (2012)
http://dx.doi.org/10.1364/OE.20.002649


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Abstract

The integration of nano structures with opto-electronic devices has many potential applications. It allows the coupling of more light into or out of the device while decreasing the size of the device itself. Such devices are reported in the VIS and NIR regions. However, making plasmonic structures for the UV region is still a challenge. Here, we report on a UV nano-antenna integrated metal semiconductor metal (MSM) photodetector based on GaN. We designed and fabricated Al grating structures. Well defined plasmonic resonances were measured in the reflectance spectra. Optimized grating structure integrated photodetectors exhibited more than sevenfold photocurrent enhancement. Finite difference time domain simulations revealed that both geometrical and plasmonic effects played role in photocurrent enhancement.

© 2012 OSA

OCIS Codes
(040.5160) Detectors : Photodetectors
(040.7190) Detectors : Ultraviolet
(250.5403) Optoelectronics : Plasmonics
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Detectors

History
Original Manuscript: December 5, 2011
Revised Manuscript: January 13, 2012
Manuscript Accepted: January 13, 2012
Published: January 20, 2012

Citation
Serkan Butun, Neval A. Cinel, and Ekmel Ozbay, "Nanoantenna coupled UV subwavelength photodetectors based on GaN," Opt. Express 20, 2649-2656 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-3-2649


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