Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > CNST and University of Maryland Researchers Bridge Nanophotonics and Conventional Optics with Surface Plasmonic Lenses Fabricated on Optical Fibers

Abstract:
Researchers from the University of Maryland and the NIST Center for Nanoscale Science and Technology have experimentally demonstrated superfocusing of light using an optical fiber-based surface plasmonic (SP) lens.

CNST and University of Maryland Researchers Bridge Nanophotonics and Conventional Optics with Surface Plasmonic Lenses Fabricated on Optical Fibers

Gaithersburg, MD | Posted on October 27th, 2011

Optical fibers have been used as low-loss light waveguides for decades. However light strongly diverges at the fiber end, limiting the utility of fiber optics for applications that require a high numerical aperture as well as a sub-diffraction-limit focal size. As described in a recent publication in Optics Express,* this limitation can be overcome by fabricating an SP lens directly on the end of an optical fiber. The fiber-based SP lens is composed of a set of concentric annular slits with varied nanoscale widths cut through a uniform gold coating at the end face of a single-mode optical fiber. The slits were fabricated using the focused ion beam system in the CNST NanoFab. When the light in the fiber impinges on the SP lens, surface plasmon polaritons (SPPs) at the slit edges are excited. Because the slit widths are smaller than the light wavelength, the light passes through the slits only as SPP modes that are coupled back to optical waves at the exit of the slits. Moreover, the SPP propagation delay can be controlled by the width of the slits in order to induce a curved wavefront of exiting optical waves and thereby achieve a tight focus at the desired distance. The researcher team has experimentally demonstrated a transverse spot size of 450 nm 60 nm, which is below the diffraction limit for the 808 nm light. Their fiber-based SP lens design can be readily integrated into many existing systems to bridge nanophotonics and conventional optics. Possible applications include laser nanofabrication, optical trapping, high-density optical storage, and high-resolution fluorescence sensing. The research team is currently exploring applications for fiber based SP lenses for both high-resolution imaging and biological sensing.

*Far-field superfocusing with an optical fiber based surface plasmonic lens made of nanoscale concentric annular slits, Y. Liu, H. Xu, F. Stief, N. Zhitenev, and M. Yu, Optics Express 19, 20233-20243 (2011).

####

About National Institute of Standards and Technology (NIST)
The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.

For more information, please click here

Contacts:
Nikolai Zhitenev
301-975-6039

Copyright © National Institute of Standards and Technology (NIST)

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

Journal Web Site

NIST Publication Database

Related News Press

News and information

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Smart hydrogel coating creates 'stick-slip' control of capillary action July 27th, 2015

Industrial Nanotech, Inc. Provides Update on PCAOB Audited Financials July 27th, 2015

Global Corrosion Resistant Nano Coatings Market To 2015: Acute Market Reports July 27th, 2015

Imaging

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Superfast fluorescence sets new speed record: Plasmonic device has speed and efficiency to serve optical computers July 27th, 2015

Sensors

American Chemical Society expands reach to include rapidly emerging area of sensor science July 25th, 2015

UT Dallas nanotechnology research leads to super-elastic conducting fibers July 24th, 2015

Iranian Scientists Create Best Conditions for Synthesis of Gold Nanolayers July 23rd, 2015

Nanopaper as an optical sensing platform July 23rd, 2015

Discoveries

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Smaller, faster, cheaper: A new type of modulator for the future of data transmission July 27th, 2015

Researchers predict material with record-setting melting point July 27th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Announcements

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Industrial Nanotech, Inc. Provides Update on PCAOB Audited Financials July 27th, 2015

Global Corrosion Resistant Nano Coatings Market To 2015: Acute Market Reports July 27th, 2015

Tools

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Superfast fluorescence sets new speed record: Plasmonic device has speed and efficiency to serve optical computers July 27th, 2015

Ultra-thin hollow nanocages could reduce platinum use in fuel cell electrodes July 24th, 2015

Deben reports on the use of their CT500 in the X-ray microtomography laboratory at La Trobe University, Melbourne, Australia July 22nd, 2015

Photonics/Optics/Lasers

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Smaller, faster, cheaper: A new type of modulator for the future of data transmission July 27th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Superfast fluorescence sets new speed record: Plasmonic device has speed and efficiency to serve optical computers July 27th, 2015

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