| Infrared surface polaritons on antimony. | |
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MedLine Citation:
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PMID: 22330506 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The semimetal antimony, with a plasma frequency ~80 times less than that of gold, is potentially useful as a host for infrared surface polaritons (SPs). Relevant IR SP properties, including the frequency-dependent propagation length and penetration depths for fields into the media on either side of the interface, were determined from optical constants measured on optically-thick thermally-evaporated Sb films over the wavelength range 1 to 40 μm. Plasma and carrier relaxation frequencies were determined from Drude-model fits to these data. The real part of the permittivity is negative for wavelengths beyond 11 μm. Distinct resonant decreases in specular reflected intensity were observed for Sb lamellar gratings in the wavelength range of 6 to 11 μm, where the real part of the permittivity is positive. Both resonance angles and the angular reflectance spectral line shapes are in agreement with theory for excitation of bound surface electromagnetic waves (SPs). Finite element method (FEM) electrodynamic simulations indicate the existence of SP modes under conditions matching the experiments. FEM results also show that such waves depend on having a significant imaginary part of the permittivity, as has been noted earlier for the case of surface exciton polaritons. |
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Authors:
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Justin W Cleary; Gautam Medhi; Monas Shahzad; Imen Rezadad; Doug Maukonen; Robert E Peale; Glenn D Boreman; Sandy Wentzell; Walter R Buchwald |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Optics express Volume: 20 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-02-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: 2693-705 Citation Subset: IM |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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