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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 18 — Aug. 29, 2011
  • pp: 17075–17085

Design of a monopole-antenna-based resonant nanocavity for detection of optical power from hybrid plasmonic waveguides

Kelvin J. A. Ooi, Ping Bai, Ming Xia Gu, and Lay Kee Ang  »View Author Affiliations


Optics Express, Vol. 19, Issue 18, pp. 17075-17085 (2011)
http://dx.doi.org/10.1364/OE.19.017075


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Abstract

A novel plasmonic waveguide-coupled nanocavity with a monopole antenna is proposed to localize the optical power from a hybrid plasmonic waveguide and subsequently convert it into electrical current. The nanocavity is designed as a Fabry-Pérot waveguide resonator, while the monopole antenna is made of a metallic nanorod directly mounted onto the metallic part of the waveguide terminal which acts as the conducting ground. The nanocavity coincides with the antenna feed sandwiched in between the antenna and the ground. Maximum power from the waveguide can be coupled into, and absorbed in the nanocavity by means of the field resonance in the antenna as well as in the nanocavity. Simulation results show that 42% optical power from the waveguide can be absorbed in a germanium filled nanocavity with a nanoscale volume of 220 × 150 × 60nm3. The design may find applications in nanoscale photo-detection, subwavelength light focusing and manipulating, as well as sensing.

© 2011 OSA

OCIS Codes
(230.0040) Optical devices : Detectors
(230.0250) Optical devices : Optoelectronics
(230.5750) Optical devices : Resonators
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optical Devices

History
Original Manuscript: July 7, 2011
Revised Manuscript: August 5, 2011
Manuscript Accepted: August 6, 2011
Published: August 16, 2011

Citation
Kelvin J. A. Ooi, Ping Bai, Ming Xia Gu, and Lay Kee Ang, "Design of a monopole-antenna-based resonant nanocavity for detection of optical power from hybrid plasmonic waveguides," Opt. Express 19, 17075-17085 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-18-17075


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