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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 13 — Jun. 21, 2010
  • pp: 13693–13699

Terahertz Waves Emitted from an Optical Fiber

Minwoo Yi, Kanghee Lee, Jongseok Lim, Youngbin Hong, Young-Dahl Jho, and Jaewook Ahn  »View Author Affiliations

Optics Express, Vol. 18, Issue 13, pp. 13693-13699 (2010)

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We report a simple method of creating terahertz waves by applying the photo-Dember effect in a (100)-oriented InAs film coated onto the 45-degree wedged-end facet of an optical fiber. The terahertz waves are generated by infrared pulses guided through the optical fiber which is nearly in contact with a sample and then measured by a conventional photo-conductive antenna detector. Using this alignment-free terahertz source, we performed proof-of-principle experiments of terahertz time-domain spectroscopy and near-field terahertz microscopy. We obtained a bandwidth of 2 THz and 180-µm spatial resolution. Using this method, the THz imaging resolution is expected to be reduced to the size of the optical fiber core. Applications of this device can be extended to sub-wavelength terahertz spectroscopic imaging, miniaturized terahertz system design, and remote sensing.

© 2010 Optical Society of America

OCIS Codes
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:

Original Manuscript: April 27, 2010
Revised Manuscript: June 6, 2010
Manuscript Accepted: June 7, 2010
Published: June 10, 2010

Minwoo Yi, Kanghee Lee, Jongseok Lim, Youngbin Hong, Young-Dahl Jho, and Jaewook Ahn, "Terahertz waves emitted from an optical fiber," Opt. Express 18, 13693-13699 (2010)

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