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Primeur weekly 2011-09-05

Exascale supercomputing

Intel forms new subsidiary focused on HPC: Intel Federal LLC ...

The Cloud

VMware and Cisco collaborate on Cloud innovation ...

Dell launches its first public Cloud offering; Dell Cloud with VMware vCloud Datacenter Service ...

Harris Corporation and VMware to deliver trusted enterprise Cloud to federal and commercial customers ...

NetApp and VMware help transform IT and make Cloud a reality ...

Symantec and VMware announce strategic partnership to deliver Desktop-as-a-Service solutions ...

New VMware vCloud offerings accelerate journey to the enterprise hybrid Cloud ...

VMware introduces new platform for enterprise Database as a Service ...

HP speeds and simplifies virtual infrastructure deployments ...

Cisco to provide Hosted Collaboration Solution for NTT Communications Cloud-based Unified Communications Service ...

EuroFlash

PRACE to organize Autumn School 2011, 25-27 October 2011 in Bruyères-le-Châtel, France ...

Kolkata institute inks accord with CERN ...

The quantum tunneling effect leads electron transport in porphyrins ...

Graphene's shining light could lead to super-fast Internet ...

USFlash

IBM expands power licensing as leading developers eye new applications ...

IBM and Jeopardy! relive history with encore presentation of Jeopardy!: The IBM challenge ...

VBI and Convey Computer partner to deliver technology to biomedical, life sciences researchers ...

Astrophysicists report first simulation to create a Milky Way-like galaxy ...

NIST achieves record-low error rate for quantum information processing with one qubit ...

Director appointed for New Zealand eScience Infrastructre ...

Berkeley scientists discover an 'instant cosmic classic' supernova ...

IEEE Xplore digital library reaches three million documents as pace of technical contributions accelerates ...

Oracle achieves world record result on SAP Assemble-to-Order (ATO) Standard Application Benchmark ...

UCSB physicists demonstrate the quantum von Neumann architecture ...

Graphene's shining light could lead to super-fast Internet

30 Aug 2011 Manchester - Writing in the journalNature Communications, a collaboration between the Universities of Manchester and Cambridge, which includes Nobel Prize winning scientists Professor Andre Geim and Professor Kostya Novoselov, has discovered a crucial recipe for improving characteristics of graphene devices for use as photodetectors in future high-speed optical communications.

By combining graphene with metallic nanostructures, they show a twentyfold enhancement in harvesting light by graphene, which paves the way for advances in high-speed internet and other communications.

By putting two closely-spaced metallic wires on top of graphene and shining light on this structure, researchers previously showed that this generates electric power. This simple device presents an elementary solar cell.

More importantly for applications, such graphene devices can be incredibly fast, tens and potentially hundred times faster than communication rates in the fastest internet cables, which is due to the unique nature of electrons in graphene, their high mobility and high velocity.

The major stumbling block towards practical applications for these otherwise very promising devices has so far been their low efficiency. The problem is that graphene - the thinnest material in the world - absorbs little light, approximately only 3%, with the rest going through without contributing to the electrical power.

The Manchester researchers have solved the problems by combining graphene with tiny metallic structures, specially arranged on top of graphene.

These so-called plasmonic nanostructures have dramatically enhanced the optical electric field felt by graphene and effectively concentrated light within the one-atom-thick carbon layer.

By using the plasmonic enhancement, the light-harvesting performance of graphene was boosted by twenty times, without sacrificing any of its speed. The future efficiency can be improved even further.

Dr Alexander Grigorenko, an expert in plasmonics and a leading member of the team, stated: "Graphene seems a natural companion for plasmonics. We expected that plasmonic nanostructures could improve the efficiency of graphene-based devices but it has come as a pleasant surprise that the improvements can be so dramatic."

Professor Novoselov added: "The technology of graphene production matures day-by-day, which has an immediate impact both on the type of exciting physics which we find in this material, and on the feasibility and the range of possible applications. Many leading electronics companies consider graphene for the next generation of devices. This work certainly boosts graphene's chances even further."

Professor Andrea Ferrari, from the Cambridge Engineering Department, who led the Cambridge effort in the collaboration, stated: "So far, the main focus of graphene research has been on fundamental physics and electronic devices. These results show its great potential in the fields of photonics and opto-electronics, where the combination of its unique optical and electronic properties with plasmonic nanostructures, can be fully exploited, even in the absence of a bandgap, in a variety of useful devices, such as solar cells and photodetectors."

Graphene is a novel two-dimensional material which can be seen as a monolayer of carbon atoms arranged in a hexagonal lattice.

It is a wonder material that possesses a large number of unique properties and is currently considered in many new technologies.

The world's thinnest material was discovered at the University of Manchester in 2004, which was acknowledged by the 2010 Nobel Prize in Physics awarded to Geim and Novoselov for their "groundbreaking experiments regarding the two-dimensional material graphene".
Source: University of Manchester

Back to Table of contents

Primeur weekly 2011-09-05

Exascale supercomputing

Intel forms new subsidiary focused on HPC: Intel Federal LLC ...

The Cloud

VMware and Cisco collaborate on Cloud innovation ...

Dell launches its first public Cloud offering; Dell Cloud with VMware vCloud Datacenter Service ...

Harris Corporation and VMware to deliver trusted enterprise Cloud to federal and commercial customers ...

NetApp and VMware help transform IT and make Cloud a reality ...

Symantec and VMware announce strategic partnership to deliver Desktop-as-a-Service solutions ...

New VMware vCloud offerings accelerate journey to the enterprise hybrid Cloud ...

VMware introduces new platform for enterprise Database as a Service ...

HP speeds and simplifies virtual infrastructure deployments ...

Cisco to provide Hosted Collaboration Solution for NTT Communications Cloud-based Unified Communications Service ...

EuroFlash

PRACE to organize Autumn School 2011, 25-27 October 2011 in Bruyères-le-Châtel, France ...

Kolkata institute inks accord with CERN ...

The quantum tunneling effect leads electron transport in porphyrins ...

Graphene's shining light could lead to super-fast Internet ...

USFlash

IBM expands power licensing as leading developers eye new applications ...

IBM and Jeopardy! relive history with encore presentation of Jeopardy!: The IBM challenge ...

VBI and Convey Computer partner to deliver technology to biomedical, life sciences researchers ...

Astrophysicists report first simulation to create a Milky Way-like galaxy ...

NIST achieves record-low error rate for quantum information processing with one qubit ...

Director appointed for New Zealand eScience Infrastructre ...

Berkeley scientists discover an 'instant cosmic classic' supernova ...

IEEE Xplore digital library reaches three million documents as pace of technical contributions accelerates ...

Oracle achieves world record result on SAP Assemble-to-Order (ATO) Standard Application Benchmark ...

UCSB physicists demonstrate the quantum von Neumann architecture ...