Transmittance of a tunable filter at terahertz frequencies

Drysdale, T.D., Gregory, I.S., Baker, C., Linfield, E.H., Tribe, W.R. and Cumming, D.R.S. (2004) Transmittance of a tunable filter at terahertz frequencies. Applied Physics Letters, 85, p. 5173. (doi: 10.1063/1.1829798)

Abstract

A metallic photonic crystal filter has been demonstrated at terahertz frequencies, with the passband tunable over the range of 365–386 GHz. Tuning is achieved by a relative lateral shift of two metallic photonic crystal plates. Each plate is comprised of two orthogonal layers of gratings and integral mounting lugs. The plates are micromachined from silicon wafers then coated in gold to provide metallic electromagnetic behavior. An insertion loss of 3–7 dB and Q in the range of 20–30 was achieved. A shift of 140 µm gave a tuning range of 21 GHz, tuning sensitivity of 150 GHz/mm, and a fractional tuning range of 6%.

• Item Type: Articles
• Keywords: Gold, photonic crystals, millimetre wave filters, microwave photonics, micromachining, micro-optics, optical tuning, finite difference time-domain analysis, light transmission, integrated optics.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Cumming, Professor David and Drysdale, Dr Timothy
• Authors: Drysdale, T.D., Gregory, I.S., Baker, C., Linfield, E.H., Tribe, W.R., and Cumming, D.R.S.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• Copyright Holders: Copyright © 2004 American Institute of Physics
• First Published: First published in Applied Physics Letters 85:5173
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher