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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 11 — May. 29, 2006
  • pp: 4815–4825

A grating-bicoupled plasma-wave photomixer with resonant-cavity enhanced structure

Taiichi Otsuji, Mitsuhiro Hanabe, Takuya Nishimura, and Eiichi Sano  »View Author Affiliations


Optics Express, Vol. 14, Issue 11, pp. 4815-4825 (2006)
http://dx.doi.org/10.1364/OE.14.004815


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Abstract

A novel terahertz plasma-wave photomixer that can improve the conversion gain and terahertz radiation power is proposed and evaluated. The photomixer is based on a high-electron mobility transistor and incorporates doubly interdigitated grating strips for the gate electrodes that periodically localize the 2D plasmons in 100-nm regions with a micron-order interval. A vertical cavity structure is formed in between the top metal grating and a terahertz mirror placed at the backside. The device features electronic tuning of plasmon characteristic frequencies, providing continuously-tunable operation below 1 THz to beyond 10 THz. Frequency-dependent finite-differential time-domain analysis demonstrates that the grating-bicoupled plasmonic structure acts as a broadband terahertz photomixer and antenna and that the vertical cavity structure effectively enhances the conversion gain and radiation power.

© 2006 Optical Society of America

OCIS Codes
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(230.6080) Optical devices : Sources
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optical Devices

History
Original Manuscript: May 5, 2006
Manuscript Accepted: May 11, 2006
Published: May 29, 2006

Citation
Taiichi Otsuji, Mitsuhiro Hanabe, Takuya Nishimura, and Eiichi Sano, "A grating-bicoupled plasma-wave photomixer with resonant-cavity enhanced structure," Opt. Express 14, 4815-4825 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-11-4815


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