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

NanoTechnology for Defense (NT4D) October 22nd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

TARA Biosystems and Harris & Harris Group Form Company to Improve Safety and Efficacy of New Therapies October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Graphene

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Graphenea opens US branch October 16th, 2014

Charged graphene gives DNA a stage to perform molecular gymnastics October 9th, 2014

Unconventional photoconduction in an atomically thin semiconductor: New mechanism of photoconduction could lead to next-generation excitonic devices October 9th, 2014

Sensors

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Graphenea opens US branch October 16th, 2014

IRLYNX and CEA-Leti to Streamline New CMOS-based Infrared Sensing Modules Dedicated to Human-activities Characterization October 15th, 2014

Nanodevices for clinical diagnostic with potential for the international market: The development is based on optical principles and provides precision and allows saving vital time for the patient October 15th, 2014

Discoveries

Mechanism behind nature's sparkles revealed October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

‘Designer’ nanodevice could improve treatment options for cancer sufferers October 22nd, 2014

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Announcements

NanoTechnology for Defense (NT4D) October 22nd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

TARA Biosystems and Harris & Harris Group Form Company to Improve Safety and Efficacy of New Therapies October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

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

Mechanism behind nature's sparkles revealed October 22nd, 2014

Special UO microscope captures defects in nanotubes: University of Oregon chemists provide a detailed view of traps that disrupt energy flow, possibly pointing toward improved charge-carrying devices October 21st, 2014

Could I squeeze by you? Ames Laboratory scientists model molecular movement within narrow channels of mesoporous nanoparticles October 21st, 2014

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Photonics/Optics/Lasers

Physicists build reversible laser tractor beam October 20th, 2014

Magnetic mirrors enable new technologies by reflecting light in uncanny ways October 16th, 2014

New VDMA Association "Electronics, Micro and Nano Technologies" founded: Inaugural Meeting in Frankfurt/Main, Germany October 15th, 2014

Nanodevices for clinical diagnostic with potential for the international market: The development is based on optical principles and provides precision and allows saving vital time for the patient October 15th, 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