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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 12959–12965

Scanning laser terahertz near-field imaging system

Kazunori Serita, Shori Mizuno, Hironaru Murakami, Iwao Kawayama, Yoshinori Takahashi, Masashi Yoshimura, Yusuke Mori, Juraj Darmo, and Masayoshi Tonouchi  »View Author Affiliations


Optics Express, Vol. 20, Issue 12, pp. 12959-12965 (2012)
http://dx.doi.org/10.1364/OE.20.012959


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Abstract

We have proposed and developed a scanning laser terahertz (THz) near-field imaging system using a 1.56μm femtosecond fiber laser for high spatial resolution and high-speed measurement. To obtain the two-dimensional (2D) THz images of samples, the laser pulses are scanned over a 2D THz emitter plate [DASC: 4’-dimenthylamino-N-methyl-4- stilbazolium p-chlorobenzenesulfonate] by a galvano meter. In this system, THz wave pulses locally generated at the laser irradiation spots transmit through the sample set on the emitter, and the amplitude of the transmitted THz wave pulse is detected by using a typical THz time-domain spectroscopy (THz-TDS) technique. Using this system, we have succeeded in obtaining THz transmission images of a triangle shaped metal sheet of millimeter-size and a human hair sample with a spatial resolution of sub-wavelength order up to ~27μm (~λTHz/28) at an imaging speed of about 47 seconds/image for 512 x 512 pixels.

© 2012 OSA

OCIS Codes
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

History
Original Manuscript: February 27, 2012
Revised Manuscript: April 20, 2012
Manuscript Accepted: April 21, 2012
Published: May 24, 2012

Citation
Kazunori Serita, Shori Mizuno, Hironaru Murakami, Iwao Kawayama, Yoshinori Takahashi, Masashi Yoshimura, Yusuke Mori, Juraj Darmo, and Masayoshi Tonouchi, "Scanning laser terahertz near-field imaging system," Opt. Express 20, 12959-12965 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-12-12959


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