G. Todd Andrews
Department of Physics and Physical Oceanography
Memorial University
Office: C-1063
Laboratory: C-1057
Telephone: 709-864-8788
Facsimile: 709-864-8739
E-mail: tandrews@mun.ca
Recent Research
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Physics 3600
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Research Interests
Non-invasive laser spectroscopic analysis and characterization of novel materials including biological systems and those with reduced dimensionality. The primary investigative techniques employed include ultra-high resolution Brillouin light scattering spectroscopy, Raman scattering spectroscopy and photoluminescence spectroscopy which, collectively, provide detailed information on the elastic, structural and optical properties of the target material. Systems of current interest include 2D semiconductors (transition metal dichalcogenides), porous silicon-based heterostructures, and biological materials systems, particularly virus crystals.
Selected Publications
  • Off-Axis Phonon and Photon Propagation in Porous Silicon Superlattices by Brillouin Spectroscopy and Optical Reflectance
    L.C. Parsons and G.T. Andrews, J. Appl. Phys. 116, 033510 (2014).

  • Brillouin Scattering from Porous Silicon-Based Optical Bragg Mirrors
    L.C. Parsons and G.T. Andrews, J. Appl. Phys. 111, 123521 (2012).

  • Systematic Brillouin Light Scattering Study of the Elastic Properties of Porous Silicon Superlattices.
    A.M. Polomska-Harlick and G.T. Andrews, J. Phys. D: Appl. Phys. 45, 075302 (2012).

  • Probing Near-Normally Propagating Bulk Acoustic Waves Using Pseudo-Reflection Geometry Brillouin Spectroscopy.
    L.C. Parsons and G.T. Andrews, AIP Advances 2, 032157 (2012).

  • Observation of Hypersonic Phononic Crystal Effects in Porous Silicon Superlattices.
    L.C. Parsons and G.T. Andrews, Appl. Phys. Lett. 95, 241909 (2009).

  • Brillouin Light Scattering from an Ordered Array of Carbon Nanotubes.
    A. Polomska, C.K. Young, G.T. Andrews, M.J. Clouter, A. Yin and J.M. Xu, Appl. Phys. Lett. 90, 201918 (2007).

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