Dielectric hole lattice for terahertz diffractive optics with high transmission

Author

Headland, Daniel ; Withayachumnankul, Withawat ; Webb, M. ; Upadhyay, Ankit ; Bhaskaran, Madhu ; Sriram, Srinath ; Abbott, Derek

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Adelaide, Adelaide, SA, Australia

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

A dielectric hole lattice is proposed for creating diffractive optics in the terahertz range. An array of sub-wavelength air-holes in a dielectric material gives rise to an artificial dielectric, with refractive index depending on hole radius. The design uses low-loss dielectric materials, and exploits a half-wavelength etalon effect to minimise reflection, leading to near-perfect transmission. A potential application is a zone plate to create high gain antennas for use in future terahertz communications links.

Keywords

dielectric materials; diffractive optical elements; light diffraction; light interferometers; light reflection; optical arrays; optical materials; refractive index; artificial dielectric; dielectric hole lattice; half-wavelength etalon effect; high gain antennas; hole radius; low-loss dielectric materials; near-perfect transmission; reflection minimization; refractive index; sub-wavelength air-hole array; terahertz communications links; terahertz diffractive optics; zone plate; Arrays; Dielectrics; Lattices; Optical diffraction; Optical variables control; Optics; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956000

Filename

6956000