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Primeur weekly 2013-10-28

Special

Both citizens and scientific communities to benifit from Desktop Grid technology within the IDGF-SP project ...

Desktop Grids technically integrated into wider Grid and Cloud infrastructure for scientific computing ...

Users are now able to build their own Desktop Grid infrastructure in the Cloud ...

Exascale supercomputing

Indiana University Center scores funds for exascale supercomputing ...

The Cloud

Innovative HPC-in-the-Cloud service for China enabled by Bright Cluster Manager ...

City of Rotterdam selects Oracle HCM Cloud to help reduce costs, automate HR processes and improve HR activities ...

HP Aurasma boosts scalability and performance for augmented reality with HP Cloud ...

eMeter, a Siemens Business, provides real-time access to data analytics in the Cloud ...

Oracle buys BigMachines ...

IBM opens Federal Cloud Innovation Center in Washington, D.C. ...

EuroFlash

Notre Dame scales up HPC with Allinea Software's tools ...

ZIB and Intel have established a research centre for many-core high performance computing in Berlin ...

ZIB successfully concluded Phase I of the acceptance test of the HLRN-III Cray supercomputer ...

AMS-IX exceeds 10 Tb/s of connected capacity ...

Saarbrücken physicists aim to make transition to quantum world visible ...

New Belarus-Russian Union State programme on SKIF supercomputers possible in 2014 ...

USFlash

Univa completes acquisition of Grid Engine assets, becoming the sole commercial provider of Grid Engine software ...

Fusion-io expands relationship with Fujitsu worldwide to accelerate PRIMERGY and PRIMEQUEST servers ...

New IDC worldwide HPC end-user study identifies latest trends in high performance computing usage and spending ...

BP opens new facility in Houston to house the world's largest supercomputer for commercial research ...

New explanation for star formation: Computer simulations to provide physical explanation for Larson's Laws ...

SGI launches portfolio of new solutions to enable Big Data innovations and big breakthroughs ...

SGI empowers enterprises with Big Data innovations for big results ...

Game-changing classroom opens in library at Clemson University ...

IBM licenses new ARM technology for custom chips aimed at networking and communications ...

Oracle licenses VMware vSphere storage APIs for Oracle storage ...

NIST/JQI team gets the edge on photon transport in silicon ...

When scaling the quantum slopes, veer for the straight path ...

NIST/JQI team gets the edge on photon transport in silicon


NIST
23 Oct 2013 Gaithersburg - Scientists have a new way to edge around a difficult problem in quantum physics, now that a research team from the National Institute of Standards and Technology (NIST) and University of Maryland's Joint Quantum Institute (JQI) have proved their recent theory about how particles of light flow within a novel device they built.

While the problem itself - how to find an easier way to study the quantum Hall effect - may be unfamiliar to many, the team's solution could help computer designers use light instead of electricity to carry information in computer circuits, potentially leading to vast improvements in efficiency.

The quantum Hall effect is observed when there is a magnetic field perpendicular to a flat wire that has electrons flowing through it. The field pushes the electrons over to one side of the wire, so their flow is concentrated along its edge. Although a fairly exotic piece of physics, the quantum Hall effect already has been applied to make better standards for electrical conductance. But the effect is hard to study because measuring it requires stringent lab conditions, including extremely low temperatures and samples of exceptional purity.

The team looked for a way around these issues, and in 2011 they found a potential, albeit theoretical, answer: Build a model system in which particles of light behave exactly like electrons do when subjected to the quantum Hall effect, and study that system instead.

"We knew building an analogous system that uses photons would have additional advantages", stated NIST physicist Mohammad Hafezi. "Light can carry much more information than electricity, so working with a photon-based system also could help us design computer components that use light."

To test their theory, the team built an array of tiny, nearly flat silicon rings atop an oxide surface. Beaming photons of the right wavelength at one of the rings makes these photons loop around the ring many times. The rings - which look like 25-micrometer wide racetracks - sit about 150 nanometers from one another, close enough that a photon in one ring can hop to an adjacent one. If a ring happens to be defective - which can and does happen in the fabrication process - the photon instead hops to another ring, but eventually finds its way back to the edge of the array, where it continues travelling. Thus the device transports photons from one place to another even if some of the rings don't function, a key point for manufacturers, who will want devices that work even if they are not physically flawless.

But why go through the trouble of making the photons go ring-hopping? Mohammad Hafezi said the rings encourage the photons to travel only along the edge of the array instead of taking a path through its midsection - just like electrons experiencing the quantum Hall effect do in a conductor. The secret, he says, lies in the rings' arrangement and its peculiar effect on the photons.

"Our theory showed the topology of the ring array would create the effect we wanted, and our experiment confirms it", Mohammad Hafezi stated. "We now have a robust silicon device that can transport photons at room temperature. We hope it will prove useful for both fundamental studies of physics as well as practical component design."

M. Hafezi, S. Mittal, J. Fan, A. Migdall and J.M. Taylor are the authors of "Imaging topological edge states in silicon photonics", which appeared inNature Photonics, doi:10.1038/nphoton.2013.274, October 20, 2013.
Source: National Institute of Standards and Technology - NIST

Back to Table of contents

Primeur weekly 2013-10-28

Special

Both citizens and scientific communities to benifit from Desktop Grid technology within the IDGF-SP project ...

Desktop Grids technically integrated into wider Grid and Cloud infrastructure for scientific computing ...

Users are now able to build their own Desktop Grid infrastructure in the Cloud ...

Exascale supercomputing

Indiana University Center scores funds for exascale supercomputing ...

The Cloud

Innovative HPC-in-the-Cloud service for China enabled by Bright Cluster Manager ...

City of Rotterdam selects Oracle HCM Cloud to help reduce costs, automate HR processes and improve HR activities ...

HP Aurasma boosts scalability and performance for augmented reality with HP Cloud ...

eMeter, a Siemens Business, provides real-time access to data analytics in the Cloud ...

Oracle buys BigMachines ...

IBM opens Federal Cloud Innovation Center in Washington, D.C. ...

EuroFlash

Notre Dame scales up HPC with Allinea Software's tools ...

ZIB and Intel have established a research centre for many-core high performance computing in Berlin ...

ZIB successfully concluded Phase I of the acceptance test of the HLRN-III Cray supercomputer ...

AMS-IX exceeds 10 Tb/s of connected capacity ...

Saarbrücken physicists aim to make transition to quantum world visible ...

New Belarus-Russian Union State programme on SKIF supercomputers possible in 2014 ...

USFlash

Univa completes acquisition of Grid Engine assets, becoming the sole commercial provider of Grid Engine software ...

Fusion-io expands relationship with Fujitsu worldwide to accelerate PRIMERGY and PRIMEQUEST servers ...

New IDC worldwide HPC end-user study identifies latest trends in high performance computing usage and spending ...

BP opens new facility in Houston to house the world's largest supercomputer for commercial research ...

New explanation for star formation: Computer simulations to provide physical explanation for Larson's Laws ...

SGI launches portfolio of new solutions to enable Big Data innovations and big breakthroughs ...

SGI empowers enterprises with Big Data innovations for big results ...

Game-changing classroom opens in library at Clemson University ...

IBM licenses new ARM technology for custom chips aimed at networking and communications ...

Oracle licenses VMware vSphere storage APIs for Oracle storage ...

NIST/JQI team gets the edge on photon transport in silicon ...

When scaling the quantum slopes, veer for the straight path ...