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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 25874–25882

InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner

Sang-Pil Han, Hyunsung Ko, Jeong-Woo Park, Namje Kim, Young-Jong Yoon, Jun-Hwan Shin, Dae Yong Kim, Dong Hun Lee, and Kyung Hyun Park  »View Author Affiliations

Optics Express, Vol. 21, Issue 22, pp. 25874-25882 (2013)

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We present a terahertz (THz) broadband antenna-integrated 1 × 20 InGaAs Schottky barrier diode (SBD) array detector with an average responsivity of 98.5 V/W at a frequency of 250 GHz, which is measured without attaching external amplifiers and Si lenses, and an average noise equivalent power (NEP) of 106.6 pW/√Hz. The 3-dB bandwidth of the SBD detector is also investigated at approximately 180 GHz. For implementing an array-type SBD detector by a simple fabrication process to achieve a high yield, a structure comprising an SiNx layer instead of an air bridge between the anode and the cathode is designed. THz line beam imaging using a Gunn diode emitter with a center frequency of 250 GHz and a 1 × 20 SBD array detector is successfully demonstrated.

© 2013 Optical Society of America

OCIS Codes
(040.0040) Detectors : Detectors
(040.1240) Detectors : Arrays
(110.0110) Imaging systems : Imaging systems
(110.2970) Imaging systems : Image detection systems
(110.6795) Imaging systems : Terahertz imaging

ToC Category:

Original Manuscript: August 30, 2013
Revised Manuscript: September 28, 2013
Manuscript Accepted: October 2, 2013
Published: October 22, 2013

Sang-Pil Han, Hyunsung Ko, Jeong-Woo Park, Namje Kim, Young-Jong Yoon, Jun-Hwan Shin, Dae Yong Kim, Dong Hun Lee, and Kyung Hyun Park, "InGaAs Schottky barrier diode array detector for a real-time compact terahertz line scanner," Opt. Express 21, 25874-25882 (2013)

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