Navigation Links
New nanolaser key to future optical computers and technologies
Date:8/16/2009

Because the new device, called a "spaser," is the first of its kind to emit visible light, it represents a critical component for possible future technologies based on "nanophotonic" circuitry, said Vladimir Shalaev, the Robert and Anne Burnett Professor of Electrical and Computer Engineering at Purdue University.

Such circuits will require a laser-light source, but current lasers can't be made small enough to integrate them into electronic chips. Now researchers have overcome this obstacle, harnessing clouds of electrons called "surface plasmons," instead of the photons that make up light, to create the tiny spasers.

Findings are detailed in a paper appearing online Sunday (Aug. 16) in the journal Nature, reporting on work conducted by researchers at Purdue, Norfolk State University and Cornell University.

Nanophotonics may usher in a host of radical advances, including powerful "hyperlenses" resulting in sensors and microscopes 10 times more powerful than today's and able to see objects as small as DNA; computers and consumer electronics that use light instead of electronic signals to process information; and more efficient solar collectors.

"Here, we have demonstrated the feasibility of the most critical component - the nanolaser - essential for nanophotonics to become a practical technology," Shalaev said.

The "spaser-based nanolasers" created in the research were spheres 44 nanometers, or billionths of a meter, in diameter - more than 1 million could fit inside a red blood cell. The spheres were fabricated at Cornell, with Norfolk State and Purdue performing the optical characterization needed to determine whether the devices behave as lasers.

The findings confirm work by physicists David Bergman at Tel Aviv University and Mark Stockman at Georgia State University, who first proposed the spaser concept in 2003.

"This work represents an important milestone that may prove to be the start of a revolution in nanophotonics, with applications in imaging and sensing at a scale that is much smaller than the wavelength of visible light," said Timothy D. Sands, the Mary Jo and Robert L. Kirk Director of the Birck Nanotechnology Center in Purdue's Discovery Park.

The spasers contain a gold core surrounded by a glasslike shell filled with green dye. When a light was shined on the spheres, plasmons generated by the gold core were amplified by the dye. The plasmons were then converted to photons of visible light, which was emitted as a laser.

Spaser stands for surface plasmon amplification by stimulated emission of radiation. To act like lasers, they require a "feedback system" that causes the surface plasmons to oscillate back and forth so that they gain power and can be emitted as light. Conventional lasers are limited in how small they can be made because this feedback component for photons, called an optical resonator, must be at least half the size of the wavelength of laser light.

The researchers, however, have overcome this hurdle by using not photons but surface plasmons, which enabled them to create a resonator 44 nanometers in diameter, or less than one-tenth the size of the 530-nanometer wavelength emitted by the spaser.

"It's fitting that we have realized a breakthrough in laser technology as we are getting ready to celebrate the 50th anniversary of the invention of the laser," Shalaev said.

The first working laser was demonstrated in 1960.

The research was conducted by Norfolk State researchers Mikhail A. Noginov, Guohua Zhu and Akeisha M. Belgrave; Purdue researchers Reuben M. Bakker, Shalaev and Evgenii E. Narimanov; and Cornell researchers Samantha Stout, Erik Herz, Teeraporn Suteewong and Ulrich B. Wiesner.

Future work may involve creating a spaser-based nanolaser that uses an electrical source instead of a light source, which would make them more practical for computer and electronics applications.


'/>"/>

Contact: Emil Venere
venere@purdue.edu
765-494-4709
Purdue University
Source:Eurekalert

Related biology technology :

1. Plasmonic whispering gallery microcavity paves the way to future nanolasers
2. Ricardo Launches Consortium to Evaluate Lubricant Challenges of Future Low Carbon Engine Technologies
3. Industry Leaders Will Gather to Discuss the Future of the "Hydrogen Economy" in Washington DC
4. GreenHouse Energy, Governor Schwarzenegger Join in Driving the Future of Fueling in California
5. POET to Outline Cellulosic Ethanol's Present, Future at Brazil's Ethanol Summit 2009
6. Health Strategies Group Forecasts Emerging Trends in Future Sales Force Models at the SPBT 2009 Conference
7. Cardium Announces Conference Call and Webcast to Review Recent Developments and Future Plans for the Excellarate(TM) Clinical Development Program
8. Isilon Hosts Industry Leaders Panel on the Future of Life Sciences and IT at Bio-IT World 2009
9. Oxygen Biotherapeutics, Inc. Signs Supply Agreement for Clinical-Grade Oxycyte for Clinical Trials and Future Needs
10. Cornerstone Therapeutics to Present at BioCenturys 2009 Future Leaders in the Biotech Industry Conference
11. Amniotic Fluid May Provide New Source of Stem Cells for Future Therapies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/10/2016)... 10, 2016  Matchbook, Inc., a company specializing ... biotech companies, announced today the appointment of ... Jim brings nearly 25 years of experience in ... spent nearly two decades in executive level roles ... at Genzyme and, most recently headed global logistics ...
(Date:2/10/2016)... ... February 10, 2016 , ... LATHAM, NEW YORK... ... SPIE Photonics West conference in San Francisco’s Moscone Center from February 16-18, ... same venue. , These latest InGaAs PIN diode standard packages feature a TO-46 ...
(Date:2/10/2016)... (PRWEB) , ... February 10, 2016 , ... ... now available on Microsoft Azure. On Azure, Arvados provides capabilities for managing and ... clear demand for Microsoft Azure from major institutions collecting and analyzing genomic data,” ...
(Date:2/10/2016)... BC (PRWEB) , ... February 09, 2016 , ... ... design services and current winner of the Highest Overall Customer Rating Award ... in all of its business units across the USA, Canada, Mexico and China. ...
Breaking Biology Technology:
(Date:2/1/2016)... Feb. 1, 2016  Today, the first day of ... plans to develop a first of its kind workplace ... IBM Watson. In the first application of ... IBM ), and Welltok will create a new ... with cognitive analytics, delivered on Welltok,s health optimization platform. ...
(Date:1/27/2016)... 2016  Rite Track, Inc. a leading semiconductor equipment ... Chester, Ohio announced today the acquisition of PLUS ... in Austin, Texas , will significantly ... modifications, installations and technical support offerings for TEL Track ... commented, "PLUS has provided world class service including refurbishment, ...
(Date:1/22/2016)... 22, 2016 ... of the  "Global Behavioral Biometric Market ... --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced ... Biometric Market 2016-2020"  report to their ... Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the ...
Breaking Biology News(10 mins):