Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Near-Field Enhancements along Ring-Shaped Nanostructures

The near-field enhancement on the surface of ring-shaped gold nanostructure becomes homogeneous through circularly polarized light.
The near-field enhancement on the surface of ring-shaped gold nanostructure becomes homogeneous through circularly polarized light.

Abstract:
Molecules close to metal nanostuctures which are illuminated by light exhibit a complex electic field. They experience electric forces along the field lines, which become very crowded in sharp regions of the nanostructures, such as corners or tips, and in the regions of high electron density. These regions of crowded field lines are called hotspots which are generally localized to small spots. If it would be possible to expand the local field enhancements to the whole sample surface, heating which limits the field enhancement could be avoided and the interaction with molecules would be increased.

Near-Field Enhancements along Ring-Shaped Nanostructures

Germany | Posted on September 20th, 2012

Ventsislav Valev (Katholieke Universiteit Leuven) and co-workers could now demonstrate that such near-field enhancements can be extended over an entire nanopatterned gold surface. The extension of the near-field is achieved by driving the electron density along ring-shaped nanostructures with circularly polarized light. They validated their concept by two sets of numerical simulations as well as by a clear experimental confirmation. The homogeneous field enhancement increases the interaction cross-section with molecules which will be useful for chemical and sensing applications.

The research was reported in Advanced Optical Materials, a new section in Advanced Materials dedicated to breakthrough discoveries and fundamental research in photonics, plasmonics, metamaterials, and more, covering all aspects of light-matter interactions.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

To get Advanced Optical Materials email alerts click here:

Related News Press

Chemistry

Flipping the switch on supramolecular electronics August 14th, 2018

News and information

Flipping the switch on supramolecular electronics August 14th, 2018

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Sensors

Optical fibers that can 'feel' the materials around them August 7th, 2018

A molecular switch at the edge of graphene July 27th, 2018

Leti & Partners Launch Pilot Program to Assess New Perception Sensors for Autonomous Vehicles July 5th, 2018

New sensor technology enables super-sensitive live monitoring of human biomolecules July 3rd, 2018

Discoveries

Flipping the switch on supramolecular electronics August 14th, 2018

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Announcements

Flipping the switch on supramolecular electronics August 14th, 2018

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project