Propagation of designer surface plasmons in structured conductor surfaces with parabolic gradient index

Bala Krishna Juluri, Sz Chin S. Lin, Thomas R. Walker, Lasse Jensen, Tony Jun Huang

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

In this work, we investigate the propagation of designer surface plasmons in planar perfect electric conductor structures that are subject to a parabolic graded-index distribution. A three-dimensional, fully vectorial finite-difference time-domain method was used to engineer a structure with a parabolic effective group index by modulating the dielectric constant of the structure's square holes. Using this structure in our simulations, the lateral confinement of propagating designer surface plasmons is demonstrated. Focusing, collimation and waveguiding of designer plasmons in the lateral direction is realized by changing the width of the source beam. Our findings contribute to applications of designer surface plasmons that require energy concentration, diffusion, guiding, and beam aperture modification within planar perfect electric conductors.

Original languageEnglish (US)
Pages (from-to)2997-3006
Number of pages10
JournalOptics Express
Volume17
Issue number4
DOIs
StatePublished - Feb 16 2009

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Propagation of designer surface plasmons in structured conductor surfaces with parabolic gradient index'. Together they form a unique fingerprint.

  • Cite this