Enhanced Fields in Mirror-Backed Low-Index Dielectric Structures

Xianyu Ao, Danqing Wang, Teri W. Odom

Research output: Contribution to journalArticle

Abstract

This Letter reports the localization of optical fields in dielectric nanopillar arrays on a metal film. Large-area arrays of tall (>450 nm) polymer pillars were patterned on an optically thick gold film by solvent-assisted nanoscale embossing. This hybrid dielectric-metal system supports two high-quality band-edge modes, with the mode at the wavelength closest to the array spacing concentrating electromagnetic field intensity at the tops of and extending beyond the nanopillars. Organic dye molecules mixed in the polymer matrix of the nanopillars showed enhanced radiative emission rates and narrow-band and unidirectional fluorescence emission. This hybrid platform offers prospects for strong near-field enhancements from low-index dielectric nanostructures.

Original languageEnglish
JournalACS Photonics
DOIs
Publication statusAccepted/In press - Jan 1 2019

Fingerprint

Polymers
Mirrors
Metals
mirrors
Electromagnetic Fields
Nanostructures
Gold
embossing
support systems
Coloring Agents
Fluorescence
concentrating
polymers
Polymer matrix
metal films
Electromagnetic fields
narrowband
near fields
electromagnetic fields
Dyes

Keywords

  • fluorescence enhancement
  • hybrid metal-dielectric nanostructures
  • narrow band
  • soft nanoscale molding
  • surface mode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Enhanced Fields in Mirror-Backed Low-Index Dielectric Structures. / Ao, Xianyu; Wang, Danqing; Odom, Teri W.

In: ACS Photonics, 01.01.2019.

Research output: Contribution to journalArticle

@article{07421e91e1f34c7b9246c895e81a8d5f,
title = "Enhanced Fields in Mirror-Backed Low-Index Dielectric Structures",
abstract = "This Letter reports the localization of optical fields in dielectric nanopillar arrays on a metal film. Large-area arrays of tall (>450 nm) polymer pillars were patterned on an optically thick gold film by solvent-assisted nanoscale embossing. This hybrid dielectric-metal system supports two high-quality band-edge modes, with the mode at the wavelength closest to the array spacing concentrating electromagnetic field intensity at the tops of and extending beyond the nanopillars. Organic dye molecules mixed in the polymer matrix of the nanopillars showed enhanced radiative emission rates and narrow-band and unidirectional fluorescence emission. This hybrid platform offers prospects for strong near-field enhancements from low-index dielectric nanostructures.",
keywords = "fluorescence enhancement, hybrid metal-dielectric nanostructures, narrow band, soft nanoscale molding, surface mode",
author = "Xianyu Ao and Danqing Wang and Odom, {Teri W.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1021/acsphotonics.9b00931",
language = "English",
journal = "ACS Photonics",
issn = "2330-4022",
publisher = "American Chemical Society",

}

TY - JOUR

T1 - Enhanced Fields in Mirror-Backed Low-Index Dielectric Structures

AU - Ao, Xianyu

AU - Wang, Danqing

AU - Odom, Teri W.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - This Letter reports the localization of optical fields in dielectric nanopillar arrays on a metal film. Large-area arrays of tall (>450 nm) polymer pillars were patterned on an optically thick gold film by solvent-assisted nanoscale embossing. This hybrid dielectric-metal system supports two high-quality band-edge modes, with the mode at the wavelength closest to the array spacing concentrating electromagnetic field intensity at the tops of and extending beyond the nanopillars. Organic dye molecules mixed in the polymer matrix of the nanopillars showed enhanced radiative emission rates and narrow-band and unidirectional fluorescence emission. This hybrid platform offers prospects for strong near-field enhancements from low-index dielectric nanostructures.

AB - This Letter reports the localization of optical fields in dielectric nanopillar arrays on a metal film. Large-area arrays of tall (>450 nm) polymer pillars were patterned on an optically thick gold film by solvent-assisted nanoscale embossing. This hybrid dielectric-metal system supports two high-quality band-edge modes, with the mode at the wavelength closest to the array spacing concentrating electromagnetic field intensity at the tops of and extending beyond the nanopillars. Organic dye molecules mixed in the polymer matrix of the nanopillars showed enhanced radiative emission rates and narrow-band and unidirectional fluorescence emission. This hybrid platform offers prospects for strong near-field enhancements from low-index dielectric nanostructures.

KW - fluorescence enhancement

KW - hybrid metal-dielectric nanostructures

KW - narrow band

KW - soft nanoscale molding

KW - surface mode

UR - http://www.scopus.com/inward/record.url?scp=85074709027&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85074709027&partnerID=8YFLogxK

U2 - 10.1021/acsphotonics.9b00931

DO - 10.1021/acsphotonics.9b00931

M3 - Article

AN - SCOPUS:85074709027

JO - ACS Photonics

JF - ACS Photonics

SN - 2330-4022

ER -