Use this URL to cite or link to this record in EThOS:
Title: Technologies for terahertz frequency sensing
Author: Otter, William James
ISNI:       0000 0004 6346 8321
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2015
Availability of Full Text:
Access from EThOS:
Access from Institution:
Electromagnetic sensors provide information about the environment around us. Historically, THz has been used for astronomy and other scientific insturments. Within this thesis, the aim is to investigate a variety of technologies that have the potential to bring THz technology to a wider market, by creating either low cost devices or technologies that can been monolithically integrated. Chapter 1 provides an introduction to THz and definitive material equations that underpin the simulations undertaken throughout the thesis. This is necessary as THz engineers and scientists come from a broad range of backgrounds where different definitions are deemed standard. Chapter 2 looks at the use of plasmonic devices for THz. Initatilly, the proposed spoof plasmon structure is investigated as a benchmark for simulation comparison and, secondly, the use of semiconductor surfaces is studied to create frequency tuneable sensors with highly confined fields. Chapter 3 moves towards more conventional quasi-optical metal mesh filters for low cost manufacture, comprising a single ultra thin metallic layer on a thick substrate. The chapter concludes with the initial design and simulations of a THz stress sensor based on the metal mesh filter. Chapter 4 looks into the use of photonic crystal technology. Several state-of-the-art devices are demonstrated: resonators, switches and attenuators. These devices have the potential to provide the building blocks for a future monolithically integrated THz architecture.
Supervisor: Lucyszyn, Stepan Sponsor: Imperial College London
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral