Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Material Developed by UC San Diego Engineers Could Speed Up Underwater Communications by Orders of Magnitude

Electrical engineers at UC San Diego have demonstrated that artificial materials can significantly improve the speed of optical communications. The team showed that an artificial metamaterial can increase the light density and blink speed of a flourescent light-emitting dye molecule. Image credit: Liu Research Group/UC San Diego
Electrical engineers at UC San Diego have demonstrated that artificial materials can significantly improve the speed of optical communications. The team showed that an artificial metamaterial can increase the light density and blink speed of a flourescent light-emitting dye molecule.

Image credit: Liu Research Group/UC San Diego

Abstract:
University of California, San Diego electrical engineering professor Zhaowei Liu and colleagues have taken the first steps in a project to develop fast-blinking LED systems for underwater optical communications.

Material Developed by UC San Diego Engineers Could Speed Up Underwater Communications by Orders of Magnitude

San Diego, CA | Posted on January 24th, 2014

In a recent article in Nature Nanotechnology, Liu and colleagues show that an artificial metamaterial can increase the light intensity and "blink speed" of a fluorescent light-emitting dye molecule.

The nanopatterned layers of silver and silicon in the new material sped up the molecule's blink rate to 76 times faster than normal, while producing an 80-fold increase in its brightness.

"The major purpose of this program is to develop a better light source for communication purposes," Liu said. "But this is just a first step in the whole story. We have proved that this artificial, manmade material can be designed to enhance light emission and intensity, but the next step will be to apply this on conventional LEDs."

Extreme blinking speed - ultrafast modulation - in blue and green LEDs is a missing link that is necessary for increasing the rate at which information can be sent via optical channels through the open water, such as between ships and submarines, submarines and divers, underwater environmental sensors and unmanned underwater vehicles, or other combinations.

If dramatically improved, optical wireless communications could eventually replace underwater acoustic communications systems for short distance applications. Acoustic communications are limited by slow speed and low data rates and may possibly cause distress to whales, dolphins and other marine life. To do this, they must develop blue and green LED systems that blink one or two orders of magnitude faster than today's blue and green gallium nitride (GaN) based LEDs.

In underwater optical wireless communications systems, data is converted from an electrical signal to optical waves that travel through the water from a light source such as a LED to an optical receiver. Blinking blue and green LEDs are already used to transfer information through the water. (Blue and green LEDs are used because their light is less apt to be absorbed by the water than other colors.)

The metamaterials developed by the researchers are synthetic, with properties not found in nature, and are specially designed to accelerate the light generation process.

So far, it's been difficult to directly convert an electrical signal into an optical signal in LEDs with adequate speed. At the moment, the blink rate for most of these converted signals is less than one gigahertz, a rate slower than the speed of most WiFi signals, Liu said.

The materials are designed to have extremely strong interactions with the light emitters that are specific to the wavelength--or color--of the emissions. In the new report, the researchers used a dye molecule that gives off a yellow-green hue. So the next step will be to pair the materials with the blue and green LEDs.

"The design of the materials may not be the hardest thing," said UC San Diego graduate student Dylan Lu, the lead author of the Nature Nanotechnology paper, who noted that they will work with LEDs that have been manufactured to a specific industry standard. "I think the major challenge, to apply it to LEDs, will be an integration issue."

Liu recently won a grant from the Office of Naval Research (ONR) to develop the fast-blinking blue and green LED systems, which includes a little more than $500,000 over three years.

Along with Electrical and Computer Engineering professors Paul Yu and Eric Fullerton, Liu aims to eventually test ultrafast blinking LED configurations in San Diego's ocean waters.

"We started from advances in fundamental material research, and we want to transfer the knowledge to the LED business," said Liu.

####

For more information, please click here

Contacts:
Catherine Hockmuth

858-822-1359

Copyright © University of California - San Diego

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Liu Research Group:

More Electrical and Computer Engineering News Via RSS:

Related News Press

News and information

The Hiden EQP Plasma Diagnostic with on-board MCA July 22nd, 2014

Bruker Awarded Fourth PeakForce Tapping Patent: AFM Mode Uniquely Combines Highest Resolution Imaging and Material Property Mapping July 22nd, 2014

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

Display technology/LEDs/SS Lighting/OLEDs

Martini Tech Inc. becomes the exclusive distributor for Yoshioka Seiko Co. porous chucks for Europe and North America July 20th, 2014

Carbodeon enables 20 percent increase in polymer thermal filler conductivity with 0.03 wt.% nanodiamond additive at a lower cost than with traditional fillers: Improved materials and processes enable nanodiamond cost reductions of up to 70 percent for electronics and LED app July 9th, 2014

'Nano-pixels' promise thin, flexible, high resolution displays July 9th, 2014

Projecting a Three-Dimensional Future: TAU researchers develop holography technology that could change the way we view the world July 9th, 2014

Wireless/telecommunications/RF/Antennas

Measuring the mass of 'massless' electrons: Taming graphene, Harvard-led researchers successfully measure collective mass of ‘massless’ electrons in motion June 24th, 2014

New quantum mechanism to trigger the emission of tunable light at terahertz frequencies June 18th, 2014

Ultra-thin wires for quantum computing: Carefully fabricating nanofibers by heating and pulling may make for highly-efficient, optics-based, low-power atom traps June 17th, 2014

SABIC collaborates with Cima NanoTech on breakthrough technology: industry-first transparent conductive polycarbonate film May 29th, 2014

Govt.-Legislation/Regulation/Funding/Policy

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices July 21st, 2014

More than glitter: Scientists explain how gold nanoparticles easily penetrate cells, making them useful for delivering drugs July 21st, 2014

Discoveries

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices July 21st, 2014

Announcements

Nanometrics Announces Upcoming Investor Events July 22nd, 2014

Bruker Awarded Fourth PeakForce Tapping Patent: AFM Mode Uniquely Combines Highest Resolution Imaging and Material Property Mapping July 22nd, 2014

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

More than glitter: Scientists explain how gold nanoparticles easily penetrate cells, making them useful for delivering drugs July 21st, 2014

Military

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Tiny laser sensor heightens bomb detection sensitivity July 19th, 2014

Future Electronics May Depend on Lasers, Not Quartz July 17th, 2014

Rice nanophotonics experts create powerful molecular sensor: Sensor amplifies optical signature of single molecules about 100 billion times July 15th, 2014

Grants/Awards/Scholarships/Gifts/Contests/Honors/Records

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Albany NanoCollege Faculty Member Selected as Editor-in-Chief of the Prestigious Journal of Electronic Materials July 1st, 2014

NSERC Boosts Funding for Waterloo Researchers on the Verge of a Breakthrough June 27th, 2014

One step to solar-cell efficiency: Rice University researchers’ chemical process may improve manufacturing June 21st, 2014

Photonics/Optics/Lasers

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Tiny laser sensor heightens bomb detection sensitivity July 19th, 2014

Future Electronics May Depend on Lasers, Not Quartz July 17th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE