Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Color to the nanoworld: New design concept for a tiny metallic lens tipped to revolutionize imaging of nanoscale objects

Figure 1: A metallic nanolens. Plasmonic resonances along stacked silver nanorods are capable of long-distance image transfer and magnification.
Figure 1: A metallic nanolens. Plasmonic resonances along stacked silver nanorods are capable of long-distance image transfer and magnification.

Abstract:
Researchers in Japan have developed a design concept for a device that allows imaging at scales previously impossible for optical instruments. Their advance is based on novel imaging techniques that allow optical imaging in the subwavelength regime, where the wavelength used is larger than the smallest features of the object being imaged. However, although subwavelength imaging is capable of significantly expanding the resolution of optical microscopes, a drawback of existing designs is that they only work at a single wavelength and in close proximity to a sample.

Color to the nanoworld: New design concept for a tiny metallic lens tipped to revolutionize imaging of nanoscale objects

Japan | Posted on October 10th, 2008

The approach developed by Satoshi Kawata's team, with members from RIKEN's Advanced Science Institute, on the other hand, allows subwavelength imaging in color and at large distances from the sample. "Such nanolenses could be used to directly image viruses or the distribution of proteins in cell membranes," says Kawata, commenting on the promise of the research.

Subwavelength imaging is based on plasmonic resonances, which are collective motions of electrons at the surface of a metal that can significantly amplify light waves in the vicinity of a metal. These amplified light fields can then be used for subwavelength imaging. However, these light fields decay rapidly away from the metal, so their use in actual imaging applications is rather limited.

Reporting in Nature Photonics, the researchers present a device concept that offers a promising solution to this problem1. Similar to a relay race, light is passed along a chain of silver nanorods (Fig. 1). A full image can be transmitted when a large number of stacked rods are bundled together.

The gaps along the stacked nanorods play an important function, despite appearing cumbersome. Firstly, the plasmonic resonances in the gaps replenish the transmitted light field that would decay rapidly along longer nanorods. Secondly, the gaps perturb the plasmonic resonances along the transmission line. As calculations by the researchers have revealed, this broadens the wavelength range that the rods can transmit, and enables the transmission of different colors along the structure. Finally, magnification of the light can be achieved if the rods are arranged such that they are tapered, which gradually expands the image as it is transmitted along the rods.

With such promising predictions, the next will be to build a device based on this concept. Whilst the researchers are continuing to improve their device design, Kawata is certain that "this invention will replace conventional lens-based optical microscopes with metallic nanolenses capable of extremely high resolution."
Reference

1. Kawata, S., Ono, A. & Verma, P. Subwavelength colour imaging with a metallic nanolens. Nature Photonics 2, 438-442 (2008).
The corresponding author for this highlight is based at the RIKEN Nanophotonics Laboratory

####

For more information, please click here

Copyright © Riken

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

article

Related News Press

News and information

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Nanolab Technologies LEAPS Forward with High-Performance Analysis Services to the World: Nanolab Orders Advanced Local Electrode Atom Probe (LEAP®) Microscope from CAMECA Unit of AMETEK Materials Analysis Division August 27th, 2015

National Space Society Welcomes Janet Ivey As New NSS Governor: Janet Ivey of Janet's Planet is NOW IN ORBIT as a member of the Board of Governors of the National Space Society August 27th, 2015

Imaging

Nanolab Technologies LEAPS Forward with High-Performance Analysis Services to the World: Nanolab Orders Advanced Local Electrode Atom Probe (LEAP®) Microscope from CAMECA Unit of AMETEK Materials Analysis Division August 27th, 2015

50 Years of Scanning Electron Microscopy from ZEISS: ZEISS celebrates the birth of the first commercial scanning electron microscope in 1965 August 26th, 2015

Discoveries

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

CWRU researchers efficiently charge a lithium-ion battery with solar cell: Coupling with perovskite solar cell holds potential for cleaner cars and more August 27th, 2015

Successful boron-doping of graphene nanoribbon August 27th, 2015

Announcements

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Nanolab Technologies LEAPS Forward with High-Performance Analysis Services to the World: Nanolab Orders Advanced Local Electrode Atom Probe (LEAP®) Microscope from CAMECA Unit of AMETEK Materials Analysis Division August 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







Car Brands
Buy website traffic