Giant and uniform fluorescence enhancement over large areas using plasmonic nanodots in 3D resonant cavity nanoantenna by nanoimprinting

Weihua Zhang, Fei Ding, Wen Di Li, Yuxuan Wang, Jonathan Hu, Stephen Y. Chou

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Using a new nanoplasmonic architecture and an optimized spacer, we observed the following: (a) the average fluorescence of an infrared dye (indocyanine green) is enhanced by2970 fold uniformly (variation < 11%) over a large sample area and over a wide range of dye concentrations (380 to 380000moleculeνm 2), laser excitation powers and laser beam sizes; and (b) for a single molecule placed at a hot spot, the fluorescence enhancement is 4.5×10 6 fold. The giant and uniform enhancements (orders of magnitude higher than before), plus easy and inexpensive large area fabrication (>4 wafers), should open up wide applications.

Original languageEnglish (US)
Article number225301
JournalNanotechnology
Volume23
Issue number22
DOIs
StatePublished - Jun 8 2012

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Giant and uniform fluorescence enhancement over large areas using plasmonic nanodots in 3D resonant cavity nanoantenna by nanoimprinting'. Together they form a unique fingerprint.

Cite this