Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Imaging

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Sensors

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

'Hot' electrons don't mind the gap: Rice University scientists find nanogaps in plasmonic gold wires enhance voltage when excited May 8th, 2017

Better living through pressure: Functional nanomaterials made easy April 19th, 2017

Discoveries

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Announcements

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Tools

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Nanometrics Announces Retirement Plans of CEO Timothy Stultz: Dr. Stultz to Continue as Director May 25th, 2017

Nanomechanics, Inc. to Exhibit at the SEM Conference: Nanoindentation experts will attend and exhibit their instruments at the Conference and Exposition on Experimental and Applied Mechanics in Indianapolis May 25th, 2017

Photonics/Optics/Lasers

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Researchers find new way to control light with electric fields May 25th, 2017

Zap! Graphene is bad news for bacteria: Rice, Ben-Gurion universities show laser-induced graphene kills bacteria, resists biofouling May 22nd, 2017

Plasmon-powered upconversion nanocrystals for enhanced bioimaging and polarized emission: Plasmonic gold nanorods brighten lanthanide-doped upconversion superdots for improved multiphoton bioimaging contrast and enable polarization-selective nonlinear emissions for novel nanoscal May 19th, 2017

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