CaltechAUTHORS
  A Caltech Library Service

Surface-wave interferometry on single subwavelength slit-groove structures fabricated on gold films

Kalkum, F. and Gay, G. and Alloschery, O. and Weiner, J. and Lezec, H. J. and Xie, Y. and Mansuripur, M. (2007) Surface-wave interferometry on single subwavelength slit-groove structures fabricated on gold films. Optics Express, 15 (5). pp. 2613-2621. ISSN 1094-4087. http://resolver.caltech.edu/CaltechAUTHORS:KALoe07

[img]
Preview
PDF
See Usage Policy.

319Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:KALoe07

Abstract

We apply the technique of far-field interferometry to measure the properties of surface waves generated by two-dimensional (2D) single subwavelength slit-groove structures on gold films. The effective surface index of refraction nsurf measured for the surface wave propagating over a distance of more than 12 μm is determined to be nsurf = 1.016±0.004, to within experimental uncertainty close to the expected bound surface plasmon-polariton (SPP) value for a Au/Air interface of n spp = 1.018. We compare these measurements to finite-difference-time-domain (FDTD) numerical simulations of the optical field transmission through these devices. We find excellent agreement between the measurements and the simulations for nsurf. The measurements also show that the surface wave propagation parameter ksurf exhibits transient behavior close to the slit, evolving smoothly from greater values asymptotically toward k spp over the first 2-3 μm of slit-groove distance xsg. This behavior is confirmed by the FDTD simulations.


Item Type:Article
Additional Information:© 2007 Optical Society of America. Original Manuscript: November 30, 2006. Manuscript Accepted: February 14, 2007. Revised Manuscript: February 13, 2007. Published: March 5, 2007. 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, is gratefully acknowledged. F.K. gratefullly acknowledges support from the Deutsche Telekom Stiftung. Technical assistance and the fabrication facilities of the Caltech Kavli Nanoscience Institute are also gratefully acknowledged.
Group:Kavli Nanoscience Institute
Issue or Number:5
Record Number:CaltechAUTHORS:KALoe07
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KALoe07
Alternative URL:http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-5-2613
Official Citation:F. Kalkum, G. Gay, O. Alloschery, J. Weiner, H. J. Lezec, Y. Xie, and M. Mansuripur, " Surface-wave interferometry on single subwavelength slit-groove structures fabricated on gold films," Opt. Express 15, 2613-2621 (2007) http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-5-2613
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7573
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:06 Mar 2007
Last Modified:03 Feb 2017 02:53

Repository Staff Only: item control page