Terahertz reflectarray as a polarizing beam splitter

Tiaoming Niu, Withawat Withayachumnankul, Aditi Upadhyay, Philipp Gutruf, Derek Abbott, Madhu Bhaskaran, Sharath Sriram, Christophe Fumeaux

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

A reflectarray is designed and demonstrated experimentally for polarization-dependent beam splitting at 1 THz. This reflective component is composed of two sets of orthogonal strip dipoles arranged into interlaced triangular lattices over a ground plane. By varying the length and width of the dipoles a polarization-dependent localized phase change is achieved on reflection, allowing periodic subarrays with a desired progressive phase distribution. Both the simulated field distributions and the measurement results from a fabricated sample verify the validity of the proposed concept. The designed terahertz reflectarray can efficiently separate the two polarization components of a normally incident wave towards different predesigned directions of ±30°. Furthermore, the measured radiation patterns show excellent polarization purity, with a cross-polarization level below-27 dB. The designed reflectarray could be applied as a polarizing beam splitter for polarization-sensitive terahertz imaging or for emerging terahertz communications.

Original languageEnglish (US)
Pages (from-to)16148-16160
Number of pages13
JournalOptics Express
Volume22
Issue number13
DOIs
StatePublished - Jun 30 2014
Externally publishedYes

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dipole antennas
Dipole antennas
antenna arrays
beam splitters
Antenna arrays
Polarization
polarization
dipoles
cross polarization
emerging
strip
purity
communication
Imaging techniques
radiation
Communication

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Niu, T., Withayachumnankul, W., Upadhyay, A., Gutruf, P., Abbott, D., Bhaskaran, M., ... Fumeaux, C. (2014). Terahertz reflectarray as a polarizing beam splitter. Optics Express, 22(13), 16148-16160. https://doi.org/10.1364/OE.22.016148

Terahertz reflectarray as a polarizing beam splitter. / Niu, Tiaoming; Withayachumnankul, Withawat; Upadhyay, Aditi; Gutruf, Philipp; Abbott, Derek; Bhaskaran, Madhu; Sriram, Sharath; Fumeaux, Christophe.

In: Optics Express, Vol. 22, No. 13, 30.06.2014, p. 16148-16160.

Research output: Contribution to journalArticle

Niu, T, Withayachumnankul, W, Upadhyay, A, Gutruf, P, Abbott, D, Bhaskaran, M, Sriram, S & Fumeaux, C 2014, 'Terahertz reflectarray as a polarizing beam splitter', Optics Express, vol. 22, no. 13, pp. 16148-16160. https://doi.org/10.1364/OE.22.016148
Niu T, Withayachumnankul W, Upadhyay A, Gutruf P, Abbott D, Bhaskaran M et al. Terahertz reflectarray as a polarizing beam splitter. Optics Express. 2014 Jun 30;22(13):16148-16160. https://doi.org/10.1364/OE.22.016148
Niu, Tiaoming ; Withayachumnankul, Withawat ; Upadhyay, Aditi ; Gutruf, Philipp ; Abbott, Derek ; Bhaskaran, Madhu ; Sriram, Sharath ; Fumeaux, Christophe. / Terahertz reflectarray as a polarizing beam splitter. In: Optics Express. 2014 ; Vol. 22, No. 13. pp. 16148-16160.
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