New scheme opens a door for transmitting information much faster
Merely a decade ago, people were amazed that their cellular phones could send a simple text message. Now smartphones send and receive high-resolution photographs, videos, emails with large attachments, and much more. The desire for endless data has become insatiable.
“The ability to deliver information from one location to another has played a very important role in advancing human civilization,” said Robert P.H. Chang, professor of materials science and engineering at Northwestern Engineering. “Today, we live in a digital world where the demand for the ability to transmit large amounts of data is growing exponentially.”
To meet this high demand, Chang and his team developed a means to modulate light signals in the near-infrared wavelength region. Their work demonstrates a new scheme to control infrared plasmons, opening a new door for transmitting massive amounts of information.
The research appeared online on Monday, February 22 in the Nature Photonics. Peijun Guo, a senior PhD student in Chang’s laboratory, is the paper’s first author.
A plasmon is a quantum particle that arises from collective oscillations of free electrons. By controlling the plasmons, researchers can enable optical switches, potentially permitting signals in optical fibers to be switched from one circuit to another — with ultimate high speeds in the terahertz.
Researchers have demonstrated active plasmonics in the ultraviolet to visible wavelength range using noble metals, such as gold. But controlling plasmons in the near- to mid-infrared spectral range — where noble materials suffer from excessive optical losses — is largely unexplored. Research in this area has recently attracted significant attention for its importance in telecommunications, thermal engineering, infrared sensing, light emission, and imaging.
Chang’s team successfully controlled plasmons in this technologically important range by using indium-tin-oxide (ITO) nanorod arrays. The low electron density of ITO enables a substantial redistribution of electron energies, which results in light signal modulation with very large absolute amplitude. By tailoring the geometry of the ITO nanorod arrays, researchers could further tune the spectral range of the signal modulation at will, which opens the door for improved telecommunications and molecular sensing.
“Our results pave the way for robust manipulation of the infrared spectrum,” Chang said.
Learn more: Using Plasmonics to Transmit More Data
The Latest on: Plasmonics
via Google News
The Latest on: Plasmonics
- Optical Sensor Based on Plasmonics Detects Hydrogen Gas Quickly on April 15, 2019 at 12:11 pm
GÖTEBORG, Sweden, April 15, 2019 — A new optical nanosensor could be used to quickly detect leaks when hydrogen mixes with air. Hydrogen, a clean and renewable energy carrier, is highly flammable when ... […]
- Key Executives for Integrated Plasmonics Corporation on April 3, 2019 at 2:54 am
Only a company representative may request an update for the company profile. Documentation will be required. To contact Integrated Plasmonics Corporation, please visit . Company data is provided by ... […]
- Plasmonics in the clouds on March 5, 2019 at 11:13 pm
(Nanowerk Spotlight) Optical materials composed of plasmonic nanoparticles have revolutionized the ability to control light – yet these plasmonic materials are typically limited to only a few phases ... […]
- Scientists develop a tunable bio-imaging device using terahertz plasmonics on March 5, 2019 at 8:48 am
We allow third-party companies to serve ads and/or collect anonymous information. These companies may use non-personally identifiable information (browser type, time and date) in order to provide ... […]
- Tunable bio-imaging device from terahertz plasmonics on March 5, 2019 at 5:59 am
Researchers have developed an easy-to-use, tunable biosensor tailored for the terahertz range. Images of mouse organs obtained using their new device verify that the sensor is capable of ... […]
- Scientists develop a tunable bio-imaging device using terahertz plasmonics on March 5, 2019 at 2:06 am
Researchers at Tokyo Institute of Technology (Tokyo Tech) have developed an easy-to-use, tunable biosensor tailored for the terahertz range. Images of mouse organs obtained using their new device ... […]
- Plasmonics technologies take on global challenges on February 22, 2019 at 4:06 am
Naomi Halas from Rice University, one of the pioneers in plasmonics research. Credit: Jeff Fitlow/Rice University In her own words Halas was working in plasmonics before it even had a name. Hailing ... […]
- Researchers add porous envelope to aluminum plasmonics on February 8, 2019 at 11:15 am
When Rice University chemist and engineer Hossein Robatjazi set out to marry a molecular sieve called MOF to a plasmonic aluminum nanoparticle two years ago, he never imagined the key would be the ... […]
- Rice U. lab adds porous envelope to aluminum plasmonics on February 8, 2019 at 11:03 am
HOUSTON -- (Feb. 8, 2019) -- When Rice University chemist and engineer Hossein Robatjazi set out to marry a molecular sieve called MOF to a plasmonic aluminum nanoparticle two years ago, he never ... […]
via Bing News