Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Periodic structures in organic light-emitters can efficiently enhance and replenish surface plasmon waves

A scanning electron microscope image of an organic grating used to excite surface plasmons
A scanning electron microscope image of an organic grating used to excite surface plasmons

Abstract:
The irradiation of a metal surface with light or electrons can result in the formation of coherent electronic oscillations called surface plasmons, an effect ideal for applications such as optical communications on optoelectronic chips. Unfortunately, however, surface plasmons quickly lose their energy during transit, limiting their on-chip propagation distance. Jing Hua Teng at the A*STAR Institute of Materials Research and Engineering and co-workers from Nankai University and Nanyang Technological University under the Singapore-China Joint Research Program have now developed nanoscale structures that are able to replenish as well as guide surface plasmons on chips[1]. "These structures can be used as plasmonic sources for lab-on-a-chip applications," says Teng.

Periodic structures in organic light-emitters can efficiently enhance and replenish surface plasmon waves

Singapore | Posted on June 9th, 2011

At the resonance frequency, surface plasmons can generate intense light fields close to the surface, especially in metallic nanostructures. For this reason, surface plasmons have been widely studied for a variety of sensing and light-focusing applications. However, the electrical resistance of metals inevitably causes losses in the movements of the electronic currents involved in surface plasmons. It is therefore important to develop schemes that are able to regenerate surface plasmons as they travel along the surface of a chip.

One possibility is the use of organic light-emitting molecules such as rhodamine B. The researchers embedded molecules of rhodamine B in a polymer matrix that was then poured onto the surface of a silver film. To couple the light emission from rhodamine B to the surface plasmons, the polymer layer was structured into a periodic grating (pictured) matched to the resonance frequency of the plasmons. Adjusting the shape and periodicity of the grating allows the light emitted from the surface plasmons to be tailored.

Similar gratings are also used as mirrors in conventional on-chip semiconductor lasers. This structural similarity raises the possibility of combining the plasmonic effects demonstrated here with existing laser designs—an approach that could well lead to the realization of a plasmonic laser.

The advantage of a plasmonic laser over a semiconductor laser is that it can be made much smaller, which is important for the miniaturization of photonic circuits and on-chip sensing applications. "However, such lasers are difficult to fabricate," says Teng. "A number of challenges remain, including how to sufficiently confine the surface plasmons between the mirrors in this kind of configuration and how to reduce the metal damping losses."

Whether for applications in sensing or the on-chip manipulation of light, the potential of these gratings for replenishing plasmons represents an important step toward making plasmonics the key technology for photonic applications in nanoscience.


The A*STAR-affiliated researchers contributing to this research are from the Institute of Materials Research and Engineering

Journal information

[1] Zhang, D. G., Yuan, X. C. & Teng, J. H. Surface plasmon-coupled emission on metallic film coated with dye-doped polymer nanogratings. Applied Physics Letters 97, 231117 (2010).

####

For more information, please click here

Contacts:
Lee Swee Heng

Copyright © The Agency for Science, Technology and Research (A*STAR)

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

Article on A*STAR Research

Link to paper 'Surface plasmon-coupled emission on metallic film coated with dye-doped polymer nanogratings'

Related News Press

News and information

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Display technology/LEDs/SS Lighting/OLEDs

Hybrid nanoantennas -- next-generation platform for ultradense data recording April 28th, 2016

Manipulating light inside opaque layers April 24th, 2016

Highlights from the Graphene Flagship April 22nd, 2016

What screens are made of: New twists (and bends) in LCD research: X-ray research at Berkeley Lab details exotic structure formed by liquid crystals April 19th, 2016

Lab-on-a-chip

POSTECH researchers develop a control algorithm for more accurate lab-on-a-chip devices April 6th, 2016

Artificial molecules April 3rd, 2016

New microwave imaging approach opens a nanoscale view on processes in liquids: Technique can explore technologically and medically important processes that occur at boundaries between liquids and solids, such as in batteries or along cell membranes March 16th, 2016

Nanoworld 'snow blowers' carve straight channels in semiconductor surfaces: NIST, IBM researchers report important addition to toolkit of 'self-assembly' methods eyed for making useful devices December 28th, 2015

Sensors

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Electrically Conductive Graphene Ink Enables Printing of Biosensors April 23rd, 2016

Highlights from the Graphene Flagship April 22nd, 2016

Discoveries

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Nuclear pores captured on film: Using an ultra fast-scanning atomic force microscope, researchers from the University of Basel have filmed 'living' nuclear pore complexes at work for the first time May 3rd, 2016

Announcements

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Photonics/Optics/Lasers

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Exploring phosphorene, a promising new material April 29th, 2016

Researchers create a first frequency comb of time-bin entangled qubits: Discovery is a significant step toward multi-channel quantum communication and higher capacity quantum computers April 28th, 2016

Hybrid nanoantennas -- next-generation platform for ultradense data recording April 28th, 2016

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic