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Quantitative determination of optical transmission through subwavelength slit arrays in Ag films: Role of surface wave interference and local coupling between adjacent slits

Pacifici, D. and Lezec, H. J. and Atwater, Harry A. and Weiner, J. (2008) Quantitative determination of optical transmission through subwavelength slit arrays in Ag films: Role of surface wave interference and local coupling between adjacent slits. Physical Review B, 77 (11). Art. No. 115411. ISSN 1098-0121. http://resolver.caltech.edu/CaltechAUTHORS:PACprb08

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Abstract

Measurement of the transmitted intensity from a coherent monomode light source through a series of subwavelength slit arrays in Ag films, with varying array pitch and number of slits, demonstrates enhancement (suppression) by factors of as much as 6 (9) when normalized to the transmission efficiency of an isolated slit. Pronounced minima in the transmitted intensity are observed at array pitches corresponding to lambdaSPP, 2lambdaSPP, and 3lambdaSPP, where lambdaSPP is the wavelength of the surface plasmon polariton (SPP). The position of these minima arises from destructive interference between incident propagating waves and pi-phase-shifted SPP waves. Increasing the number of slits to four or more does not increase appreciably the per-slit transmission intensity. A simple interference model fits well the measured transmitted intensity profile.


Item Type:Article
ORCID:
AuthorORCID
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2008 The American Physical Society. (Received 11 February 2008; published 7 March 2008) Support from the Caltech Kavli Nanoscience Institute, the National Science Foundation under Grant No. DMR 0606472 and the use of facilities at the Center for Science and Engineering of Materials, an NSF Materials Research Science and Engineering Center at Caltech, are gratefully acknowledged. Support from the Ministère délégué à l’Enseignement Supérieur et à la Recherche under the programme ACI-“Nanosciences-Nanotechnologies,” the Région Midi-Pyrénées (SFC/CR 02/22), and FASTNet (HPRN-CT-2002-00304) EU Research Training Network, as well as from the research foundation FAPESP of the State of São Paulo, Brazil is also gratefully acknowledged.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
Kavli Nanoscience InstituteUNSPECIFIED
NSFDMR-0606472
Ministère délégué à l’Enseignement Supérieur et à la RechercheACI-“Nanosciences-Nanotechnologies
Région Midi-Pyrénées(SFC/CR 02/22
Marie Curie FellowshipHPRN-CT-2002-00304
Fundação de Amparo à Pesquisa do Estado de Sao Paulo (FAPESP)UNSPECIFIED
Subject Keywords:metallic thin films; polaritons; silver; surface plasmons
Record Number:CaltechAUTHORS:PACprb08
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:PACprb08
Alternative URL:http://dx.doi.org/10.1103/PhysRevB.77.115411
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9720
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:10 Mar 2008
Last Modified:28 Sep 2017 21:38

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