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Personal profile

Research interests

Biographical Information

  • Senior lecturer, University of Bath 1994-
  • Royal Society Industrial Fellow, University of Cambridge 1992-4
  • Senior Research Scientist, GEC-Marconi Hirst Research Laboratories 1985-1992
  • Research Associate, University of Edinburgh 1982-5
  • DPhil (Oxford) 1982
  • MA (Oxford) 1979

Research Interests

My current research interests are in ultrafast phenomena in condensed matter, instrument development, nanofabrication and computer modeling. The work of my group is typified by experimental studies of materials and devices using femtosecond pump-probe techniques. In particular, we use a particular specialization of this method known as time domain terahertz (THz) spectroscopy. We have used this technique to study the dynamics of electrons, phonons and plasmons in semiconductor nanostructures and the propagation of light on microstructured metal-dielectric surfaces. We have also developed an ultrabroadband and polarization sensitive THz spectrometer and a fibre coupled THz near field microscope. Current or planned projects involve near THz field imaging of microstructured waveguides, establishing techniques to measure THz circular dichroism in biomaterials, the development of a cheap THz instrument for assessing drought stress in crops, THz electro-chemical sensing and femtosecond studies of graphene.

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polaritons Physics & Astronomy
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phonons Physics & Astronomy
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Projects 2001 2018

Nanolithography
Nanotechnology
Lithography
Physics
Dry etching

Terahertz Gas-Fibre Photonics

Andrews, S. & Knight, J.

5/11/124/05/16

Project: Research council

photonics
fibers
radiation
gases
waveguides

Terahertz Circular Dichroism Spectroscopy

Andrews, S.

14/02/1115/08/14

Project: UK charity

Electron beam lithography
Lithography
Dry etching
Wet etching
Field emission

Research Output 2002 2019

  • 25 Article
  • 1 Conference contribution

Interferometric refractive index sensing with Terahertz spoof surface plasmons

Andrews, S., Pan, Y., Huggard, P. G. & Mohamad Hashim, S. N., 15 May 2019, In : International Journal of Infrared and Millimeter Waves. 40, 5, p. 516-523 8 p.

Research output: Contribution to journalArticle

Open Access
1 Citation (Scopus)

High dynamic range, hyper-terahertz coherent detection with silicon photoconductors

Muir, A. C., Hussain, A. & Andrews, S. R., 13 Jun 2016, In : Applied Physics Letters. 108, 24, 241102.

Research output: Contribution to journalArticle

Open Access
File
photoconductors
dynamic range
silicon
air
detectors
3 Citations (Scopus)

Optical microfiber-based photonic crystal cavity

Andrews, S., Yu, Y., Sun, Y. Z., Li, Z. & Ding, W., 2016, Journal of Physics: Conference series. IOP Publishing, Vol. 680. 012029. (Conference Series).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
microfibers
photonics
cavities
crystals
structural design

Terahertz waveguiding between parallel dielectric films

Pan, Y. & Andrews, S. R., 12 Jan 2015, In : Optics Express. 23, 1, p. 274-281 8 p.

Research output: Contribution to journalArticle

Open Access
File
optical reflection
hollow
analogs
waveguides
fibers
6 Citations (Scopus)

Demonstration of broad photonic crystal stop band in a freely-suspended microfiber perforated by an array of rectangular holes

Yu, Y., Ding, W., Gan, L., Li, Z., Luo, Q. & Andrews, S. R., 10 Feb 2014, In : Optics Express. 22, 3, p. 2528-2535 8 p.

Research output: Contribution to journalArticle

Open Access
File
microfibers
allowances
reflectors
artifacts
ion beams

Datasets

Data set for the paper 'High dynamic range hyper-terahertz detection with silicon photoconductors'

Andrews, S. (Creator), Muir, A. (Creator), Hussain, A. (Creator), University of Bath, 2016

Dataset

Thesis

Biological and chemical sensing at terahertz frequencies

Author: Mohamad Hashim, S. N., 24 May 2017

Supervisor: Andrews, S. (Supervisor)

Student thesis: Doctoral ThesisMPhil

File

Teraherts Waveguiding on Metamaterials

Author: Williams, C., 1 Aug 2009

Supervisor: Maier, S. (Supervisor) & Andrews, S. (Supervisor)

Student thesis: Doctoral ThesisPhD

File

Terahertz Time-Domain Spectroscopy and Near-Field Imaging of Microstructured Waveguides

Author: Pan, Y., 11 Dec 2013

Supervisor: Andrews, S. (Supervisor)

Student thesis: Doctoral ThesisPhD

File

The application of time-domain spectroscopy to the study of optical activity in metamaterials

Author: Zangui, S., 17 May 2013

Supervisor: Andrews, S. (Supervisor)

Student thesis: Doctoral ThesisPhD

File