Compact quarter-wave plate metasurface at 1 and 2.2 THz

Author

Torres, Victor ; Sanchez, Nuria ; Etayo, David ; Ortuno, Ruben ; Navarro-Cia, Miguel ; Martinez, Alejandro ; Beruete, Miguel

Author_Institution

MmW - THz - IR & Plasmonics Lab., Univ. Publica de Navarra, Pamplona, Spain

fYear

2015

fDate

13-17 April 2015

Firstpage

1

Lastpage

2

Abstract

We propose a very compact dual-band quarter-wave plate (QWP) which is inspired on extraordinary transmission subwavelength hole arrays. To control independently orthogonal polarizations, the original square holes are connected with vertical slits and meander lines replace their lateral straight sides. The structure is numerically analyzed and experimentally demonstrated at terahertz frequencies. The metasurface exhibits an experimental fractional bandwidth equal to 16.8% and 2.9% (52.1% and 4.3% in simulation) at 1 THz and 2.2 THz in a structure as compact as 0.13? and 0.29λ, respectively.

Keywords

electromagnetic wave transmission; numerical analysis; optical retarders; compact dual-band quarter-wave plate; compact quarter wave plate metasurface; extraordinary transmission subwavelength hole arrays; fractional bandwidth; frequency 1 THz; frequency 2.2 THz; meander lines; numerical analysis; orthogonal polarizations; square holes; vertical slits; Bandwidth; Dual band; Optical devices; Optical polarization; Optical retarders; Plasmons; Substrates; birefringence; extraordinary transmission; metasurface; quarter-wave plate; terahertz applications;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EuCAP), 2015 9th European Conference on

Conference_Location

Lisbon

Type

conf

Filename

7228312