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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 2875–2889

Experimental demonstration of reflectarray antennas at terahertz frequencies

Tiaoming Niu, Withawat Withayachumnankul, Benjamin S.-Y. Ung, Hakan Menekse, Madhu Bhaskaran, Sharath Sriram, and Christophe Fumeaux  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 2875-2889 (2013)

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Reflectarrays composed of resonant microstrip gold patches on a dielectric substrate are demonstrated for operation at terahertz frequencies. Based on the relation between the patch size and the reflection phase, a progressive phase distribution is implemented on the patch array to create a reflector able to deflect an incident beam towards a predefined angle off the specular direction. In order to confirm the validity of the design, a set of reflectarrays each with periodically distributed 360 × 360 patch elements are fabricated and measured. The experimental results obtained through terahertz time-domain spectroscopy (THz-TDS) show that up to nearly 80% of the incident amplitude is deflected into the desired direction at an operation frequency close to 1 THz. The radiation patterns of the reflectarray in TM and TE polarizations are also obtained at different frequencies. This work presents an attractive concept for developing components able to efficiently manipulate terahertz radiation for emerging terahertz communications.

© 2013 OSA

OCIS Codes
(110.5100) Imaging systems : Phased-array imaging systems
(300.6495) Spectroscopy : Spectroscopy, teraherz
(240.6645) Optics at surfaces : Surface differential reflectance

ToC Category:
Imaging Systems

Original Manuscript: October 31, 2012
Revised Manuscript: January 10, 2013
Manuscript Accepted: January 11, 2013
Published: January 30, 2013

Tiaoming Niu, Withawat Withayachumnankul, Benjamin S.-Y. Ung, Hakan Menekse, Madhu Bhaskaran, Sharath Sriram, and Christophe Fumeaux, "Experimental demonstration of reflectarray antennas at terahertz frequencies," Opt. Express 21, 2875-2889 (2013)

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