Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Graphene surfaces on photonic racetracks

Graphene biochemical sensors could become reality
Graphene biochemical sensors could become reality

Abstract:
Graphene could enable new kind of photonics-based chemical sensors and photo-detectors, University of Manchester researchers have shown.

Graphene surfaces on photonic racetracks

Manchester, UK | Posted on August 2nd, 2014

In an article published in Optics Express, scientists from The University of Manchester describe how graphene can be wrapped around a silicon wire, or waveguide, and modify the transmission of light through it.

Just as information can be carried by electrons in metal wires in a microchip, photons of light can carry information through silicon waveguides to form a photonic microchip. Photonic microchips are often regarded as the future of computer processing and telecommunications because of the vastly increased speeds of operation and bandwidth enhancements.

Perhaps more surprisingly, they are also finding applications as highly sensitive bio-chemical sensor devices.

In this work led by University of Manchester scientists Dr Aravind Vijayaraghavan and Dr Iain Crowe in collaboration with scientists from University of Southampton, graphene coatings have been applied to what are known as ‘racetrack resonators' - waveguide loops shaped like oval racetracks - to form a potentially novel device architecture.

Dr Vijayaraghavan explains: "When light travels around such a racetrack, some of the light ‘leaks' out of the waveguide surface, and this ‘evanescent field' can be used for chemical sensing applications. A coating of graphene on the surface of a waveguide can be used to add further capability to such a sensor, such as making it more sensitive and selective.

"In this paper, we have calculated how much light is absorbed by the graphene when it coats the waveguide, and recommend optimum conditions for the graphene coating to serve as a sensor enhancement layer."

Dr Crowe added: "The addition of the graphene layer to our silicon waveguide dramatically alters the way the light is guided through the device meaning that the light will interact even more strongly with surface deposited molecules, when employed in a sensor device.

"This strong interaction between the light and the graphene layer means that the device could also be used to improve the detection of light itself, at very low levels and across a broad range of frequencies when employed in a device known as a ‘photo-detector'.

Notes for editors
The paper ‘Determination of the quasi-TE mode (in-plane) graphene linear absorption coefficient via integration with silicon-on-insulator racetrack cavity resonators' by Iain F Crowe, Nicholas Clark, Siham Hussein, Brian Towlson, Eric Whittaker, Milan M Milosevic, Frederic Y Gardes, Goran Z Mashanovich, Matthew P Halsall, and Aravind Vijayaraghavan is available on request from the Press Office.

Dr Vijayaraghavan is available for interview on request

####

For more information, please click here

Contacts:
Daniel Cochlin
Graphene Communications and Marketing Manager
The University of Manchester
0161 275 8382
07917 506158
www.graphene.manchester.ac.uk
www.manchester.ac.uk
Twitter: @UoMGraphene

Copyright © University of Manchester

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 News Press

News and information

Purdue 3-D printing innovation capable of making stronger, lighter metal works for auto, aerospace industries November 20th, 2014

Leica Microsystems Presents Universal Hybrid Detector for Single Molecule Detection and Imaging at SfN and ASCB: Leica HyD SMD - the Optimal Detector for Precise and Reliable SMD data November 20th, 2014

Silver Nanoparticles Produced in Iran from Forest Plants Extract November 20th, 2014

Nano Sorbents Able to Remove Pollutions Caused by Oil Derivatives November 20th, 2014

Graphene

Graphene/nanotube hybrid benefits flexible solar cells: Rice University labs create novel electrode for dye-sensitized cells November 17th, 2014

Graphene Frontiers Partners with Madico to Accelerate Material Production: Deal to ignite and fulfill demand for industrial scale graphene film that supports energy, consumer electronics, membranes/filtration, solar and other applications November 12th, 2014

Pseudospin-driven spin relaxation mechanism in graphene November 11th, 2014

Drexel Engineers Improve Strength, Flexibility of Atom-Thick Films November 11th, 2014

Sensors

UO-industry collaboration points to improved nanomaterials: University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices November 20th, 2014

Spiraling light, nanoparticles and insights into life’s structure November 19th, 2014

New materials for more powerful solar cells: Major breakthrough in solar energy November 11th, 2014

“Dolomite’s Resealable Chip Interface offers easy access to microfluidic chip surface” November 10th, 2014

Discoveries

UO-industry collaboration points to improved nanomaterials: University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices November 20th, 2014

Silver Nanoparticles Produced in Iran from Forest Plants Extract November 20th, 2014

Nano Sorbents Able to Remove Pollutions Caused by Oil Derivatives November 20th, 2014

NRL Scientists Discover Novel Metamaterial Properties within Hexagonal Boron Nitride November 20th, 2014

Announcements

Purdue 3-D printing innovation capable of making stronger, lighter metal works for auto, aerospace industries November 20th, 2014

Leica Microsystems Presents Universal Hybrid Detector for Single Molecule Detection and Imaging at SfN and ASCB: Leica HyD SMD - the Optimal Detector for Precise and Reliable SMD data November 20th, 2014

Silver Nanoparticles Produced in Iran from Forest Plants Extract November 20th, 2014

Nano Sorbents Able to Remove Pollutions Caused by Oil Derivatives November 20th, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

UO-industry collaboration points to improved nanomaterials: University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices November 20th, 2014

Silver Nanoparticles Produced in Iran from Forest Plants Extract November 20th, 2014

Nano Sorbents Able to Remove Pollutions Caused by Oil Derivatives November 20th, 2014

NRL Scientists Discover Novel Metamaterial Properties within Hexagonal Boron Nitride November 20th, 2014

Photonics/Optics/Lasers

NRL Scientists Discover Novel Metamaterial Properties within Hexagonal Boron Nitride November 20th, 2014

Penn engineers efficiently 'mix' light at the nanoscale November 17th, 2014

'Direct writing' of diamond patterns from graphite a potential technological leap November 5th, 2014

Outsmarting Thermodynamics in Self-assembly of Nanostructures: Berkeley Lab reports method for symmetry-breaking in feedback-driven self-assembly of optical metamaterials November 4th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE