Optimization of 3D plasmonic crystal structures for refractive index sensing

Joana Maria, Tu T. Truong, Jimin Yao, Tae Woo Lee, Ralph G. Nuzzo, Sven Leyffer, Stephen K. Gray, John A. Rogers

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

We study the refractive index sensitive transmission of a 3D plasmonic crystal that consists of a square array of subwavelength cylindrical nanowells in a polymer conformally coated with a gold film. Using extensive 3D finite-difference time-domain simulations, we investigate the effect of system parameters such as periodicity, well diameter and depth, and metal thickness on its refractive index sensitivity. These theoretical results are also confirmed experimentally in some cases. Our calculations predict an enhancement in sensitivity by an order of magnitude when the plasmonic crystal characteristics are optimized.

Original languageEnglish (US)
Pages (from-to)10493-10499
Number of pages7
JournalJournal of Physical Chemistry C
Volume113
Issue number24
DOIs
StatePublished - Jun 18 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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