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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry Van Driel
  • Vol. 26, Iss. 9 — Sep. 1, 2009
  • pp: A52–A57

Application of plasmon-resonant microchip emitters to broadband terahertz spectroscopic measurement

Yuki Tsuda, Tsuneyoshi Komori, Abdelouahad El Fatimy, Kouhei Horiike, Tetsuya Suemitsu, and Taiichi Otsuji  »View Author Affiliations

JOSA B, Vol. 26, Issue 9, pp. A52-A57 (2009)

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We are proposing our original 2D-plasmon-resonant microchip emitter as a new terahertz light source. The structure is based on a high-electron-mobility transistor and features interdigitated dual-grating gates. The dual-grating gates can alternately modulate the 2D electron densities to periodically distribute the plasmonic cavities along the channel, acting as an antenna. The die fabricated in a 70 μ m square with a double-deck In Ga P In Ga As Ga As material system can emit 0.5 6.5 THz radiation with microwatt power even at room temperature from self-oscillating 2D plasmons under the DC-biased conditions. The microchip emitter was introduced into a Fourier-transformed far-infrared spectrometer as a light source. Its applicability to broadband terahertz spectroscopy was verified through real measurements for atmospheric water vapor and several sugar groups.

© 2009 Optical Society of America

OCIS Codes
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(250.5403) Optoelectronics : Plasmonics
(300.6495) Spectroscopy : Spectroscopy, teraherz

Original Manuscript: February 2, 2009
Revised Manuscript: April 11, 2009
Manuscript Accepted: May 6, 2009
Published: June 12, 2009

Yuki Tsuda, Tsuneyoshi Komori, Abdelouahad El Fatimy, Kouhei Horiike, Tetsuya Suemitsu, and Taiichi Otsuji, "Application of plasmon-resonant microchip emitters to broadband terahertz spectroscopic measurement," J. Opt. Soc. Am. B 26, A52-A57 (2009)

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