Roger Lewis is an active researcher in the area of terahertz science and technology. (The terahertz region of the electromagnetic spectrum falls between the infrared and microwaves.) He is sole chief investigator (CI) on a 2006-2008 Australian Research Council (ARC) Discovery Project, 'High efficiency terahertz emitters'. He is lead CI in a 2007-2009 ARC International Linkage project, 'Advanced materials and structures for terahertz science and technology'. He was lead CI in two recent ARC Linkage Infrastructure and Equipment grants to set up terahertz time-domain spectroscopy (2004) and terahertz two-colour mixing (2006) facilities at Wollongong. In 2007 he was invited to speak on candidate terahertz emitters at international conferences in London, Chisinau and Canberra. He is a Fellow of the Australian Institute of Physics and a Fellow of the Royal Microscopical Society. Professor Lewis is also an accomplished teacher, as recognised by a Vice-Chancellor's Award for Outstanding Contribution to Teaching and Learning, The NSW Minister for Education and Training & The Australian College of Educators Quality Teaching Award, and a Carrick Citation. He is a member of the American Association of Physics Teachers, the Australasian Association for Engineering Education, and the Australian College of Educators. Professor Lewis is also active in academic governance. He was Head of the School of Engineering Physics at the University of Wollongong 2002-2007 and is currently the Chair of the Faculty of Engineering Research Committee. For further information refer to Professor Lewis' faculty page.
Articles
Bulk and surface field-induced optical rectification from (11N) zincblende crystals in a quasireflection geometry (with Krunal Radhanpura and Stuart Hargreaves), Faculty of Engineering - Papers (2011)
In a previous article, we presented a generalized expression for second-order bulk and third-order surfacefield–induced...
Fiber metamaterials with negative magnetic permeability in the terahertz (with Anna Wang, Alessandro Tuniz, Peter Hunt, Elise Pogson, Avi Bendavid, Simon Fleming, Boris Kuhlmey, and Maryanne Large), Faculty of Engineering - Papers (2011)
We present a novel method for producing metamaterials with a terahertz magnetic response via fiber...
Mechanisms of x-ray emission from peeling adhesive tape (with Evan Constable and Josip Horvat), Faculty of Engineering - Papers (2010)
It has previously been reported that x-rays are emitted when adhesive tape is peeled in...
Peeling adhesive tape emits electromagnetic radiation at terahertz frequencies (with J. Horvat), Faculty of Engineering - Papers (2009)
An unusual concept for a simple and inexpensive terahertz source is presented: unpeeling adhesive tape....
Physical Phenomena in ElectronicMaterials in the Terahertz Region, Faculty of Engineering - Papers (2007)
Terahertz radiation is a powerful probe of materials’ properties, because many materials have characteristic energies...
Presentations
Detection of biochar components for soil fertility using THz-TDS (with E M. Pogson, J Horvat, and S D. Joseph), Faculty of Engineering - Papers (2010)
Different forms of biochar can have greatly different properties as fertilisers, yet there is no...
Electrical and Optical Properties of La0.7Ca0.3MnO3 Polycrystalline and Thin Film (with F. Gao, M. Ionescu, X. L. Wang, and S. X. Dou), Faculty of Engineering - Papers (2008)
The La0.7Ca0.3MnO3 thin film shows a metal-insulator transition at temperature around 150 K, about 100...
Electroresistance of Perovskite Manganites (with D. C. Pond), Faculty of Engineering - Papers (2008)
A comprehensive delineation of current-voltage-temperature space is given for La0.66Sr0.33MnO3 and La0.8Li0.2MnO3. The first shows...
Terahertz Emission from Mercury Cadmium Telluride (with M. L. Smith, R. Mendis, and R. E. M. Vickers), Faculty of Engineering - Papers (2008)
THz-frequency electromagnetic radiation may be generated by illuminating a suitable target with short pulses of...
THz Emission from Mercury Cadmium Telluride Films Grown on Cadmium Zinc Telluride Substrates (with R. Mendis, M. L. Smith, R. E. Vickers, and C. Zhang), Faculty of Engineering - Papers (2006)
We have observed THz emission from single- and double-layer HgCdTe (MCT) films epitaxially grown on...