Featured Research

from universities, journals, and other organizations

Bending light with better precision

Date:
August 16, 2011
Source:
American Institute of Physics
Summary:
Physicists have demonstrated a new technique to control the speed and direction of light using memory metamaterials whose properties can be repeatedly changed. A metamaterial is a structure engineered from a variety of substances that, when put together, yield optical properties that do not exist in nature.

Physicists from the University of California at San Diego (UCSD) have demonstrated a new technique to control the speed and direction of light using memory metamaterials whose properties can be repeatedly changed. A metamaterial is a structure engineered from a variety of substances that, when put together, yield optical properties that do not exist in nature.

In this experiment, the metamaterial in use is a hybrid device made of split ring resonators (SRRs) -- gold rings with a chunk taken out of one side -- over a thin layer of vanadium dioxide (VO2). By applying a pulse of electricity to this SRR-VO2 hybrid, the physicists can create a temperature gradient along the device that selectively changes the way the material interacts with light -- changing the light's speed and direction, for example, or how much light is reflected or absorbed at each point along the device. The material even "remembers" these changes after the voltage is removed.

In a paper published in the AIP's Applied Physics Letters, the UCSD team -- in collaboration with researchers from Duke University in Durham, N.C., and the Electronics and Telecommunications Research Institute (ETRI) in South Korea -- applied this gradient-producing principle to show that it's possible to modify the way that light interacts with a metamaterial on the order of a single wavelength for 1-terahertz-frequency radiation.

Being able to tune metamaterial devices at this level of precision -- repeatedly, as required, and after the metamaterial has been fabricated -- opens the door to new techniques, including the ability to manufacture Gradient Index of Refraction (GRIN) devices, that can be used for a variety of imaging and communication technologies.


Story Source:

The above story is based on materials provided by American Institute of Physics. Note: Materials may be edited for content and length.


Journal Reference:

  1. M. D. Goldflam, T. Driscoll, B. Chapler, O. Khatib, N. Marie Jokerst, S. Palit, D. R. Smith, Bong-Jun Kim, Giwan Seo, Hyun-Tak Kim, M. Di Ventra, D. N. Basov. Reconfigurable gradient index using VO2 memory metamaterials. Applied Physics Letters, 2011; 99 (4): 044103 DOI: 10.1063/1.3615804

Cite This Page:

American Institute of Physics. "Bending light with better precision." ScienceDaily. ScienceDaily, 16 August 2011. <www.sciencedaily.com/releases/2011/08/110815113617.htm>.
American Institute of Physics. (2011, August 16). Bending light with better precision. ScienceDaily. Retrieved September 16, 2014 from www.sciencedaily.com/releases/2011/08/110815113617.htm
American Institute of Physics. "Bending light with better precision." ScienceDaily. www.sciencedaily.com/releases/2011/08/110815113617.htm (accessed September 16, 2014).

Share This



More Matter & Energy News

Tuesday, September 16, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Space Race Pits Bezos Vs Musk

Space Race Pits Bezos Vs Musk

Reuters - Business Video Online (Sep. 16, 2014) — Amazon CEO Jeff Bezos' startup will team up with Boeing and Lockheed to develop rocket engines as Elon Musk races to have his rockets certified. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Manufacturer Prints 3-D Car In Record Time

Manufacturer Prints 3-D Car In Record Time

Newsy (Sep. 15, 2014) — Automobile manufacturer Local Motors created a drivable electric car using a 3-D printer. Printing the body only took 44 hours. Video provided by Newsy
Powered by NewsLook.com
Refurbished New York Subway Tunnel Unveiled After Sandy Damage

Refurbished New York Subway Tunnel Unveiled After Sandy Damage

Reuters - US Online Video (Sep. 15, 2014) — New York officials unveil subway tunnels that were refurbished after Superstorm Sandy. Nathan Frandino reports. Video provided by Reuters
Powered by NewsLook.com
Frustration As Drone Industry Outpaces Regulation In U.S.

Frustration As Drone Industry Outpaces Regulation In U.S.

Newsy (Sep. 14, 2014) — U.S. firms worry they’re falling behind in the marketplace as the FAA considers how to regulate commercial drones. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

      Technology News



      Save/Print:
      Share:  

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile iPhone Android Web
      Follow Facebook Twitter Google+
      Subscribe RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins