Navigation Links
Graphene Research: Trapping light in a carbon net
Date:6/21/2012

the graphene lattice at greatly reduced velocities. The slowing effect was attributed to the formation of plasmons, a type of hybrid particle produced by coupling of the photons to electronic excitations in graphene. It has not been possible to study the predicted plasmons experimentally, because the momentum of the infrared photons was far too low to excite them.

Bringing photons to the point

This problem has now been solved with the aid of a tiny metal pin with a nanometer-sized tip. Acting like a lightning rod, it concentrates incident light into a very small volume. This raises the momentum of infrared photons by up to 60-fold, giving them the extra momentum they need to launch plasmonic waves along the graphene layer. For this purpose, the researchers made use of a commercial infrared scanning near-field microscope, whose finely honed scanning tip is normally used to map the chemical composition of a material under test

In this case only the edge zone of a graphene sample was imaged. Reflection of the plasmons at this edge produces an interference pattern, which encodes information that can be used to confirm formation of the plasmons. It also allows one to deduce many of their properties, such as the magnitude of the reflection at the graphene edge and the change in the velocity by external electric bias, which is of particular interest for future applications. "The long-sought ability to control light signals by electrical means has thus been realized," says Keilmann.

An independent study carried out by a Spanish group, based on the use of a graphene sheet formed by deposition from the gas phase rather than the exfoliated film used in the LMU work, comes to a similar conclusion. The two papers have now appeared back-to-back in the top-tier journal Nature, underlining the significance of these findings for the field of nanoelectronics.


'/>"/>
Contact: Luise Dirscherl
dirscherl@lmu.de
49-892-180-2706
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Researching graphene nanoelectronics for a post-silicon world
2. UCSB professor receives award for graphene electronics research
3. Graphene foam detects explosives, emissions better than todays gas sensors
4. Imperfections may improve graphene sensors
5. Graphene earns its stripes
6. Functionalized graphene oxide plays part in next-generation oil-well drilling fluids
7. Imperfections may improve graphene sensors
8. Nanowiggles: Scientists discover graphene nanomaterials with tunable functionality in electronics
9. Graphene rips follow rules
10. Graphene reveals its magnetic personality
11. Slippery when stacked: NIST theorists quantify the friction of graphene
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/24/2014)... , Dec. 24, 2014   BioLife Solutions , ... manufacturer and marketer of proprietary clinical grade hypothermic ... precision thermal shipping products for cells and ... will hold its 2015 Annual Meeting of Stockholders on ... the expected date for the Annual Meeting represents a ...
(Date:12/24/2014)... MA (PRWEB) December 23, 2014 Earlier ... Dr. James L. Sherley, director of the Adult Stem ... on an often overlooked and under appreciated unique property ... Self-Renewal by Distributed Stem Cells: Misunderstood in the Past, ... message to congress participants. He gave the address ...
(Date:12/24/2014)... 23, 2014 According to Ross Selinger, President ... of ITRA Global, the national office market continues to be ... This is evidenced by the third quarter’s surprising 3.9% GDP, ... Low energy costs have held inflation down and the Fed ... the housing market remaining soft. , This solid economic news ...
(Date:12/24/2014)... report expects global cell isolation and expansion market to ... carefully analyzed data about the vital drivers, restraints, trends, ... Copy of Report @ http://bit.ly/1yUxy0T , According ... will keep witnessing growth at an impressive CAGR during ... by rapid technological advancements, government funding and investments, and ...
Breaking Biology Technology:BioLife Solutions Sets Date for Annual Meeting of Stockholders 2Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 2Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 3Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 4ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3The Cell Expansion Market is Expected to Reach $14.8 billion by 2019 - New Research Report by MarketsandMarkets 2The Cell Expansion Market is Expected to Reach $14.8 billion by 2019 - New Research Report by MarketsandMarkets 3
... press release is available in German . ... be no longer useless or even a problem. On the ... easily or to store data more efficiently! These are two ... made at the Physikalisch-Technische Bundesanstalt (PTB). This so-called "thermoelectric voltage" ...
... 2011 Pacira Pharmaceuticals, Inc. (Nasdaq: PCRX ), ... for the company,s third quarter ended September 30, 2011 will ... 2011. The Pacira management team will host a conference call ... developments on Monday, Oct. 31, 2011 at 9 a.m. ET. ...
... Mexico, Oct. 24, 2011 Synthetic Genomics Inc. (SGI), ... solutions to a variety of markets including biofuels, biochemicals, ... C.V., a Mexico based investing and management company with ... agribusiness, have announced the formation of a new company, ...
Cached Biology Technology:Magnetic nanoswitch for thermoelectric voltages 2Pacira Pharmaceuticals, Inc. Announces Timing for Third Quarter 2011 Financial Results Webcast and Conference Call 2Pacira Pharmaceuticals, Inc. Announces Timing for Third Quarter 2011 Financial Results Webcast and Conference Call 3Synthetic Genomics Inc. and Plenus, S.A. de C.V. Form New Sustainable Agriculture Company, Agradis, Inc. to Develop and Commercialize Products Using Genomic Technologies 2Synthetic Genomics Inc. and Plenus, S.A. de C.V. Form New Sustainable Agriculture Company, Agradis, Inc. to Develop and Commercialize Products Using Genomic Technologies 3Synthetic Genomics Inc. and Plenus, S.A. de C.V. Form New Sustainable Agriculture Company, Agradis, Inc. to Develop and Commercialize Products Using Genomic Technologies 4Synthetic Genomics Inc. and Plenus, S.A. de C.V. Form New Sustainable Agriculture Company, Agradis, Inc. to Develop and Commercialize Products Using Genomic Technologies 5
(Date:12/19/2014)... Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) ... Monitor: North America Perimeter Security Systems Market" report ... The North American perimeter security market ... from 2014 to 2019. Although the U.S. market holds ... is expected to grow at a higher ...
(Date:12/17/2014)... YORK , Dec. 15, 2014  HITLAB ... Good Clinical Practices (GCP) audit to confirm its ... (FDA) regulations. This accomplishment enables HITLAB to conduct ... utilizing the highest principles for patient safety and ... improve global healthcare access, quality, and delivery with ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has ... in the APAC Region 2015-2019"  report to their ... in this market is advances in technology. With ... upgrade biometric solutions to the latest standard that ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... delivering oxygen to our vital organs are obstructed by atherosclerosis ... attack or damage to a peripheral tissue such as the ... injury or destruction from a choked-off blood supply varies from ... whose circulatory system has the best back-up plan to provide ...
... when under threat from predators to keep closer together ... according to new research headed by scientists at the ... for Complex Systems Analysis (YCCSA), based in the University,s ... experimental study of group behaviour to discover that shoaling ...
... the late 20th century rival some of North Africa,s ... peers back in time to the year 1179. ... and Tunisia shows frequent and severe droughts during the ... the 20th century. An international research team ...
Cached Biology News:Study pinpoints new role of molecule in the health of body's back-up blood circulation 2Study pinpoints new role of molecule in the health of body's back-up blood circulation 3Study pinpoints new role of molecule in the health of body's back-up blood circulation 420th century one of driest in 9 centuries for northwest Africa 220th century one of driest in 9 centuries for northwest Africa 3
... suitable for use with a wide range ... to water and some of the higher ... of removing water and organic solvents from ... microplates, vials and round bottom flasks; making ...
... The Brownlee Precision Model 410 is a ... used to amplify small signals from sources which ... frequency noise. Each channel consists of a high ... 2-pole lowpass filter, and an output offset control. ...
Proliferin (N-14)...
Porcine Aortic Smooth Muscle Cells (PAOSMC) (>500,000 cells)...
Biology Products: