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Title: Surface plasmon enhanced terahertz spectroscopic distinguishing between isotopes
Authors: Tian, Z.
Han, J. 
Lu, X.
Gu, J.
Xing, Q.
Zhang, W.
Issue Date: 16-Jun-2009
Citation: Tian, Z., Han, J., Lu, X., Gu, J., Xing, Q., Zhang, W. (2009-06-16). Surface plasmon enhanced terahertz spectroscopic distinguishing between isotopes. Chemical Physics Letters 475 (1-3) : 132-134. ScholarBank@NUS Repository.
Abstract: We present an experimental demonstration of surface plasmon enhanced terahertz spectroscopic identification of methyl alcohol isotopes by use of metallic array of subwavelength holes. Due to isotopic hydrogen/deuterium substitution, the refractive indices of methyl alcohol and isotopes vary from each other in the terahertz regime. This leads to a modification in the wave vector and consequently the resonance condition of surface plasmons excited at the metal-dielectric interface. A distinct resonance shift and an amplitude modification are observed, giving high characterization sensitivity and thereby demonstrating that such plasmonic array has potential in developing new techniques in isotope distinguishing. © 2009 Elsevier B.V. All rights reserved.
Source Title: Chemical Physics Letters
ISSN: 00092614
DOI: 10.1016/j.cplett.2009.05.003
Appears in Collections:Staff Publications

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