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Investigating Narrow Plasmons in Nanoparticle Arrays Fabricated Using Electron Beam Lithography.

Published online by Cambridge University Press:  01 February 2011

Erin M. Hicks ,
Linda Gunnarrsson ,
Tomas Rindevicius ,
Shengli Zou ,
Bengt Kasemo ,
Mikael Käll ,
Goerge C. Schatz ,
Kenneth G. Spears  and
Richard P. Van Duyne
Erin M. Hicks*
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113USA
Linda Gunnarrsson
Affiliation:
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden S-214 96
Tomas Rindevicius
Affiliation:
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden S-214 96
Shengli Zou
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113USA
Bengt Kasemo
Affiliation:
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden S-214 96
Mikael Käll
Affiliation:
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden S-214 96
Goerge C. Schatz
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113USA
Kenneth G. Spears
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208-3113USA
*
§Corresponding Author: e-mclellan@northwestern.edu
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Abstract

The improvement of nanofabrication is one of the driving forces behind advancements in the fields of electronics, photonics and sensors. Precise control over nanoscale architecture is an essential aspect in relating new size-dependent material properties. Direct writing methods such as Electron Beam Lithography (EBL), enable precise “user-defined” writing of nanostructures in a wide range of materials. Using electrodynamics calculations, Schatz and coworkers have discovered one dimensional array structures built from spherical silver nanoparticles that produce remarkably narrow plasmon resonance spectra upon irradiation with light that is polarized perpendicularly to the array axis. In order to investigate these interactions, precise control of nanoparticle orientation, size, shape and spacing is necessary. If the overall structures have excessive defects then the effect may not be seen. To have the best control over array fabrication and to look at these interactions experimentally, EBL was used to construct lines of circular cylinders of varying interparticle spacings. Dark field microscopy was used to look at overall sample homogeneity and collect the single particle plasmon resonance spectrum. Additionally, a UV-visible spectrometer with a variable angle stage was used to look at the bulk line properties. With experimental verification of the theory will lead to not only a more thorough understanding of the underlying principles of nanophotonics, but also application in biosensing, that potentially improve on current technologies.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 872: Symposium J – Micro- and Nanosystems—Materials and Devices , 2005 , J16.1
Copyright
Copyright © Materials Research Society 2005

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