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Primeur weekly 2017-02-20

Focus

HPC expert Genias Benelux to show its skillful expertise in brandnew website ...

Are billion Euro Flagships the right way to finance innovative areas like graphene, human brain research and quantum computing? ...

Exascale supercomputing

Advanced fusion code led by PPPL selected to participate in Early Science Programmes on three new DOE Office of Science pre-exascale supercomputers ...

Focus on Europe

From robotics to particle physics: Data analytics gets the spotlight in Distinguished Talk series at ISC 2017 ...

A new spin on electronics ...

Data mining tools for personalized cancer treatment ...

Why host HPC in Iceland to tackle Big Data for life sciences at Earlham Insititute ...

Biological experiments become transparent - anywhere, any time ...

Middleware

IBM delivers new platform to help clients address storage challenges at massive scale ...

Hewlett Packard Enterprise unveils most significant 3PAR Flash storage innovations to date ...

Hardware

Tokyo Institute of Technology partners with DDN on Tsubame3.0 to build forward-looking AI and Big Data computing infrastructure ...

Mellanox demonstrates four times improvement in crypto performance with Innova IPsec 40G Ethernet network adapter ...

Supermicro launches BigTwin - the industry's highest performing Twin multi-node system supporting the full range of CPUs, maximum memory and all-flash NVMe ...

Applications

Researchers catch extreme waves with higher-resolution modelling ...

Researchers are creating software to 'clean' large datasets, making it easier for scientists and the public to use Big Data ...

Designing new materials from 'small' data ...

Success by deception ...

DNA computer brings 'intelligent drugs' a step closer ...

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices ...

Perimeter Institute researchers apply machine learning to condensed matter physics ...

When treating brain aneurysms, two isn't always better than one ...

Real-time MRI analysis powered by supercomputers ...

Analyzing data for transportation systems using TACC's Rustler, XSEDE ECSS support ...

NCSA facilitates performance comparisons with China's nr. 1 supercomputer ...

IBM delivers Watson for cyber security to power cognitive security operations centres ...

The Cloud

Optimizing data centre placement and network design to strengthen Cloud computing ...

Dutch start-up solution impacts data centres ...

OpenFog Consortium releases landmark reference architecture for Fog computing ...

IBM brings machine learning to the private Cloud ...

IBM accelerates hybrid Cloud adoption by enabling channel partners to offer VMware solutions ...

Oracle launches Cloud service to help organisations integrate disparate data and drive real-time analytics ...

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices

SEM images of a 'lossless' metamaterial that behaves simultaneously as a metal and a semiconductor. Credit: Ultrafast and Nanoscale Optics Group at UC San Diego.17 Feb 2017 San Diego - Engineers at the University of California San Diego have developed a material that could reduce signal losses in photonic devices. The advance has the potential to boost the efficiency of various light-based technologies including fiber optic communication systems, lasers and photovoltaics.

The discovery addresses one of the biggest challenges in the field of photonics: minimizing loss of optical (light-based) signals in devices known as plasmonic metamaterials.

Plasmonic metamaterials are materials engineered at the nanoscale to control light in unusual ways. They can be used to develop exotic devices ranging from invisibility cloaks to quantum computers. But a problem with metamaterials is that they typically contain metals that absorb energy from light and convert it into heat. As a result, part of the optical signal gets wasted, lowering the efficiency.

In a recent study published inNature Communications, a team of photonics researchers led by electrical engineering professor Shaya Fainman at the UC San Diego Jacobs School of Engineering demonstrated a way to make up for these losses by incorporating into the metamaterial something that emits light - a semiconductor.

"We're offsetting the loss introduced by the metal with gain from the semiconductor. This combination theoretically could result in zero net absorption of the signal - a 'lossless' metamaterial", stated Joseph Smalley, an electrical engineering postdoctoral scholar in Shaya Fainman's group and the first author of the study.

In their experiments, the researchers shined light from an infrared laser onto the metamaterial. They found that depending on which way the light is polarized - which plane or direction (up and down, side to side) all the light waves are set to vibrate - the metamaterial either reflects or emits light.

"This is the first material that behaves simultaneously as a metal and a semiconductor. If light is polarized one way, the metamaterial reflects light like a metal, and when light is polarized the other way, the metamaterial absorbs and emits light of a different 'color' like a semiconductor", Joseph Smalley stated.

Researchers created the new metamaterial by first growing a crystal of the semiconductor material, called indium gallium arsenide phosphide, on a substrate. They then used high-energy ions from plasma to etch narrow trenches into the semiconductor, creating 40-nanometer-wide rows of semiconductor spaced 40 nanometers apart. Finally, they filled the trenches with silver to create a pattern of alternating nano-sized stripes of semiconductor and silver.

"This is a unique way to fabricate this kind of metamaterial", Joseph Smalley stated. Nanostructures with different layers are often made by depositing each layer separately one on top of another, "like a stack of papers on a desk", Joseph Smalley explained. But the semiconductor material used in this study - indium gallium arsenide phosphide - can't just be grown on top of any substrate like silver, otherwise it will have defects. "Rather than creating a stack of alternating layers, we figured out a way to arrange the materials side by side, like folders in a filing cabinet, keeping the semiconductor material defect-free."

As a next step, the team plans to investigate how much this metamaterial and other versions of it could improve photonic applications that currently suffer from signal losses.

The full paper is titled " Luminescent hyperbolic metasurfaces ". The authors of the study are J.S.T. Smalley, F. Vallini, S.A. Montoya, L. Ferrari, S. Shahin, C.T. Riley, B. Kanté, E.E. Fullerton, Z. Liu, and Y. Fainman.

This work was supported by the Office of Naval Research Multidisciplinary Research Initiative (N00014-13-1-0678), the National Science Foundation (ECE3972 and ECCS-1229677), the National Science Foundation Center for Integrated Access Networks (EEC-0812072), the Defense Advanced Research Projects Agency (N66001-12-1-4205) and the Cymer Corporation.
Source: University of California - San Diego

Back to Table of contents

Primeur weekly 2017-02-20

Focus

HPC expert Genias Benelux to show its skillful expertise in brandnew website ...

Are billion Euro Flagships the right way to finance innovative areas like graphene, human brain research and quantum computing? ...

Exascale supercomputing

Advanced fusion code led by PPPL selected to participate in Early Science Programmes on three new DOE Office of Science pre-exascale supercomputers ...

Focus on Europe

From robotics to particle physics: Data analytics gets the spotlight in Distinguished Talk series at ISC 2017 ...

A new spin on electronics ...

Data mining tools for personalized cancer treatment ...

Why host HPC in Iceland to tackle Big Data for life sciences at Earlham Insititute ...

Biological experiments become transparent - anywhere, any time ...

Middleware

IBM delivers new platform to help clients address storage challenges at massive scale ...

Hewlett Packard Enterprise unveils most significant 3PAR Flash storage innovations to date ...

Hardware

Tokyo Institute of Technology partners with DDN on Tsubame3.0 to build forward-looking AI and Big Data computing infrastructure ...

Mellanox demonstrates four times improvement in crypto performance with Innova IPsec 40G Ethernet network adapter ...

Supermicro launches BigTwin - the industry's highest performing Twin multi-node system supporting the full range of CPUs, maximum memory and all-flash NVMe ...

Applications

Researchers catch extreme waves with higher-resolution modelling ...

Researchers are creating software to 'clean' large datasets, making it easier for scientists and the public to use Big Data ...

Designing new materials from 'small' data ...

Success by deception ...

DNA computer brings 'intelligent drugs' a step closer ...

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices ...

Perimeter Institute researchers apply machine learning to condensed matter physics ...

When treating brain aneurysms, two isn't always better than one ...

Real-time MRI analysis powered by supercomputers ...

Analyzing data for transportation systems using TACC's Rustler, XSEDE ECSS support ...

NCSA facilitates performance comparisons with China's nr. 1 supercomputer ...

IBM delivers Watson for cyber security to power cognitive security operations centres ...

The Cloud

Optimizing data centre placement and network design to strengthen Cloud computing ...

Dutch start-up solution impacts data centres ...

OpenFog Consortium releases landmark reference architecture for Fog computing ...

IBM brings machine learning to the private Cloud ...

IBM accelerates hybrid Cloud adoption by enabling channel partners to offer VMware solutions ...

Oracle launches Cloud service to help organisations integrate disparate data and drive real-time analytics ...