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Primeur weekly 2018-08-20

Focus

NVIDIA's Tensor Core GPU offers best of both worlds for HPC and AI with multiple precision ...

Quantum computing

Another step forward on universal quantum computer ...

Quantum material is promising 'ion conductor' for research and new technologies ...

Focus on Europe

Professor Arndt Bode receives highest award for public service in Germany ...

Baycrest co-created Virtual Brain joins flagship neuroscience initiative in Europe ...

Middleware

ShareBackup could keep data in the fast lane ...

Hardware

Asetek to issue Q2 2018 with a record quarterly revenue ...

HPE triples performance and enhances energy efficiency in new supercomputer for National Renewable Energy Laboratory (NREL) ...

NVIDIA reinvents computer graphics with Turing architecture ...

NVIDIA unveils Quadro RTX, world's first ray-tracing GPU ...

CoolIT Systems announces STULZ ANZ as master distributor for liquid cooling products in Australasian region ...

Tachyum touts benefits of universal processor for hyperscale data centres, HPC and AI markets at Hot Chips 2018 ...

"Mission: Green Computing" by Supermicro introduces total cost to the environment (TCE) for leading data centres ...

Rochester Institute of Technology awarded NSF grant to advance high-tech computer architectures ...

Applications

OmniTier's CompStor brings de novo analytics to genomics ...

Deep Learning stretches up to scientific supercomputers ...

More efficient security for Cloud-based machine learning ...

Trailblazer in computational complexity theory to receive Knuth Prize ...

Fellowships recognize tomorrow's supercomputing innovators ...

Magnetic antiparticles offer new horizons for information technologies ...

Low bandwidth? Use more colors at once ...

The Cloud

Tracking down the Big Bang: CERN and Oracle extend research and development partnership ...

Premier Indian Government think tank partners with Perlin Network to advance its national distributed computing infrastructure ...

Low bandwidth? Use more colors at once


New ultrathin nanocavities with embedded silver strips have streamlined colour production, and therefore broadened possible bandwidth, for both today's electronics and future photonics. Credit: Purdue University image/Alexander Kildishev.
16 Aug 2018 West Lafayette - The rainbow is not just colours - each colour of light has its own frequency. The more frequencies you have, the higher the bandwidth for transmitting information. Only using one colour of light at a time on an electronic chip currently limits technologies based on sensing changes in scattered colour, such as detecting viruses in blood samples, or processing airplane images of vegetation when monitoring fields or forests.

Putting multiple colours into service at once would mean deploying multiple channels of information simultaneously, broadening the bandwidth of not only today's electronics, but also of the even faster upcoming "nanophotonics" that will rely on photons - fast and massless particles of light - rather than slow and heavy electrons to process information with nanoscale optical devices.

IBM and Intel have already developed supercomputer chips that combine the higher bandwidth of light with traditional electronic structures.

As researchers engineer solutions for eventually replacing electronics with photonics, a Purdue University-led team has simplified the manufacturing process that allows utilizing multiple colours at the same time on an electronic chip instead of a single colour at a time.

The researchers also addressed another issue in the transition from electronics to nanophotonics: The lasers that produce light will need to be smaller to fit on the chip.

"A laser typically is a monochromatic device, so it's a challenge to make a laser tunable or polychromatic", stated Alexander Kildishev, associate professor of electrical and computer engineering at Purdue University. "Moreover, it's a huge challenge to make an array of nanolasers produce several colors simultaneously on a chip."

This requires downsizing the "optical cavity", which is a major component of lasers. For the first time, researchers from Purdue, Stanford University and the University of Maryland embedded so-called silver "metasurfaces" - artificial materials thinner than light waves - in nanocavities, making lasers ultrathin.

"Optical cavities trap light in a laser between two mirrors. As photons bounce between the mirrors, the amount of light increases to make laser beams possible", Alexander Kildishev stated. "Our nanocavities would make on-a-chip lasers ultrathin and multicolour."

Currently, a different thickness of an optical cavity is required for each color. By embedding a silver metasurface in the nanocavity, the researchers achieved a uniform thickness for producing all desired colors. Their findings appear in Nature Communications .

"Instead of adjusting the optical cavity thickness for every single colour, we adjust the widths of metasurface elements", Alexander Kildishev stated.

Optical metasurfaces could also ultimately replace or complement traditional lenses in electronic devices.

"What defines the thickness of any cell phone is actually a complex and rather thick stack of lenses", Alexander Kildishev stated. "If we can just use a thin optical metasurface to focus light and produce images, then we wouldn't need these lenses, or we could use a thinner stack."

A patent has been filed for this technology. The work was supported by the Air Force Office of Scientific Research (AFOSR) MURI grant FA9550-14-1-0389 and the Defense Advanced Research Projects Agency's Defense Sciences Office Extreme Optics and Imaging (EXTREME) programme, Award HR00111720032.
Source: Purdue University

Back to Table of contents

Primeur weekly 2018-08-20

Focus

NVIDIA's Tensor Core GPU offers best of both worlds for HPC and AI with multiple precision ...

Quantum computing

Another step forward on universal quantum computer ...

Quantum material is promising 'ion conductor' for research and new technologies ...

Focus on Europe

Professor Arndt Bode receives highest award for public service in Germany ...

Baycrest co-created Virtual Brain joins flagship neuroscience initiative in Europe ...

Middleware

ShareBackup could keep data in the fast lane ...

Hardware

Asetek to issue Q2 2018 with a record quarterly revenue ...

HPE triples performance and enhances energy efficiency in new supercomputer for National Renewable Energy Laboratory (NREL) ...

NVIDIA reinvents computer graphics with Turing architecture ...

NVIDIA unveils Quadro RTX, world's first ray-tracing GPU ...

CoolIT Systems announces STULZ ANZ as master distributor for liquid cooling products in Australasian region ...

Tachyum touts benefits of universal processor for hyperscale data centres, HPC and AI markets at Hot Chips 2018 ...

"Mission: Green Computing" by Supermicro introduces total cost to the environment (TCE) for leading data centres ...

Rochester Institute of Technology awarded NSF grant to advance high-tech computer architectures ...

Applications

OmniTier's CompStor brings de novo analytics to genomics ...

Deep Learning stretches up to scientific supercomputers ...

More efficient security for Cloud-based machine learning ...

Trailblazer in computational complexity theory to receive Knuth Prize ...

Fellowships recognize tomorrow's supercomputing innovators ...

Magnetic antiparticles offer new horizons for information technologies ...

Low bandwidth? Use more colors at once ...

The Cloud

Tracking down the Big Bang: CERN and Oracle extend research and development partnership ...

Premier Indian Government think tank partners with Perlin Network to advance its national distributed computing infrastructure ...