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Professor Stephen Elliott

Our research is mainly concerned with different aspects of (bio)chemical sensing (e.g. using MEMS or optical devices), and with non-crystalline materials (e.g. glasses), understanding their physical properties in terms of their atomic structure and defects. The approach is multidisciplinary, covering solid-state chemistry, physics and materials science. Areas of interest include:

  • Microcantilever sensors for ultra-sensitive detection of chemical and biological analytes.
  • Optical sensors, including evanescent-waveguide sensors, SERS using holographic substrates.
  • Computer simulation of the atomic structure and vibrational dynamics of disordered materials.
  • Ab-initio computer simulation of phase transformations and optically-induced metastabilities in glasses, e.g. used in phase-change memories (Flash replacement).
  • Experimental study of optically-induced changes in glasses, with applications in the fields of optical- waveguides and chemical sensors, data storage and all-optical actuation.

Figure: Ab initio molecular-dynamics model of the amorphous state of the phase-change non- volatile memory material Ge2Sb2Te5

Selected Publications

 

  • Computer-simulation design of new phase-change memory materials. Phys. Status Solidi A 207, 510 (2010)
  • Spatial distribution of rare-earth ions and GaS4 tetrahedra in chalcogenide glasses studied via laser spectroscopy and ab initio molecular dynamics simulation. Phys. Rev. B 81, 104204 (2010)
  • Simultaneous readout of multiple microcantilever arrays with phase-shifting interferometric microscopy (PSIM) Rev. Sci. Instr. (2009), 80, 093101-8
  • Evidence of formation of tightly bound rare-earth clusters in chalcogenide glasses and their evolution with glass compositions. Phys Rev B, (2009), 79, 180202(1-4)
  • Evanescent-Wave Excitation of Surface-Enhanced Raman Scattering Substrates by an Optical-Fiber Taper. Optics Letters (2009) 34, 2685-2687
  • Microscopic origin of the fast crystallization ability of Ge-Sb-Te phase-change memory materials, Nat. Mat., (2008), 7, 399
  • All-optical actuation of amorphous chalcogenide-coated cantilevers, J. Non-Cryst. Sol., (2007), 353, 250.
  • Universal features of terahertz absorption in disordered materials, Phys. Rev. Lett., (2006), 97, 055504
  • Universal features of localized eigenstates in disordered systems, J. Phys. Cond. Matt, (2005), 17, L321

Publications

Structural properties of transition-metal clusters via force-biased Monte Carlo and ab initio calculations: A comparative study
DK Limbu, R Atta-Fynn, DA Drabold, SR Elliott, P Biswas
– Physical Review B
(2017)
96,
ARTN 174208
First-principles simulations of vibrational decay and lifetimes in a-Si:H and a-Si:D
R Atta-Fynn, DA Drabold, SR Elliott, P Biswas
– Physical Review B
(2017)
95,
ARTN 104205
Morphology and Number Density of Voids in Hydrogenated Amorphous Silicon: An Ab Initio Study
P Biswas, D Paudel, R Atta-Fynn, DA Drabold, SR Elliott
– Physical Review Applied
(2017)
7,
ARTN 024013
The significance of the amorphous potential energy landscape for dictating glassy dynamics and driving solid-state crystallisation
MT Ruggiero, M Krynski, EO Kissi, J Sibik, D Markl, NY Tan, D Arslanov, W van der Zande, B Redlich, TM Korter, H Grohganz, K Löbmann, T Rades, SR Elliott, JA Zeitler
– Physical chemistry chemical physics : PCCP
(2017)
19,
30039
The Relation between Chemical Bonding and Ultrafast Crystal Growth.
TH Lee, SR Elliott
– Adv Mater
(2017)
29,
1700814
Optical layout for the measurement of a porous silicon sensor array
T Hutter, G Wellio, J Chan, AV Kellarev, SR Elliott, S Ruschin
– Optics InfoBase Conference Papers
(2017)
Part F82-CLEO_Europe 2017,
Design of a Nanoscale, CMOS-Integrable, Thermal-Guiding Structure for Boolean-Logic and Neuromorphic Computation.
D Loke, JM Skelton, T-C Chong, SR Elliott
– ACS Appl Mater Interfaces
(2016)
8,
34530
Addendum and Erratum: Nature of vibrational excitations in vitreous silica [Phys. Rev. B 56, 8605 (1997)]
NS Shcheblanov, ME Povarnitsyn, SN Taraskin, SR Elliott
– Physical Review B
(2016)
94,
ARTN 099903
Estimation of semiconductor-like pigment concentrations in paint mixtures and their differentiation from paint layers using first-derivative reflectance spectra
AR Pallipurath, JM Skelton, P Ricciardi, SR Elliott
– Talanta
(2016)
154,
63
Metadynamical approach to the generation of amorphous structures: The case of a-Si:H
P Biswas, R Atta-Fynn, SR Elliott
– Physical Review B
(2016)
93,
ARTN 184202
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Research Group

Research Interest Groups

Telephone number

01223 336525

Email address

sre1@cam.ac.uk