Featured Research

from universities, journals, and other organizations

Optical control of magnetic effects at the nanoscale

Date:
June 6, 2011
Source:
Technische Universitaet Dortmund
Summary:
Magneto-optical effects, which exploit the interaction between light and magnetic materials, have only been relevant for fundamental research and up to now rarely used for applications. Plasmons – electronic excitations in metals with dimensions at the nanoscale – recently opened a new way to concentrate light at nanoscale.

Magneto-optical effects, which exploit the interaction between light and magnetic materials, have only been relevant for fundamental research and up to now rarely used for applications. Plasmons -- electronic excitations in metals with dimensions at the nanoscale -- recently opened a new way to concentrate light at nanoscale. This allows plasmonic circuits to be built with electrical as well as optical control at this dimension scale.

It would be ideal to apply such optical control for processing data on hard drives. In this way, writing and scanning frequencies of up to one billion operations per second, impossible so far, can be achieved. For this purpose it should be possible to optically switch the magnetic storage elements of a nanometer size on such hard drives. Optical excitation of plasmons could also be used here. Physicists at TU Dortmund around Dr. Ilya Akimov and colleagues from Russia and India have now succeeded in developing a procedure to merge magneto-optics and plasmonics. The effects which were realized in the laboratory of Experimental Physics II for the first time are already that promising, that their application in electronic components should be possible in the next future.

On the suggestion of Dr. Vladimir Belotelov and his colleagues from Moscow State University, Russian samples were produced at the Tata-Institute of Fundamental Research in Mumbai, India where a gold grating was applied to a ferromagnetic material (bismuth iron garnet film) transparent for red light. This gold grating has 100 nanometers wide slits at an interval of a half micrometer. Thus, the gold grating, optically opaque without the slits, becomes highly transparent for red light.

Moreover, depending on the magnetization of the ferromagnets, the transmission of this layer-series can be drastically changed up to one thousand times as often as reported before, as shown by the experiments carried out at TU Dortmund by Dr. Ilya Akimov and his colleagues. Further improvements should be easily achieved through optimization of the investigated samples.


Story Source:

The above story is based on materials provided by Technische Universitaet Dortmund. Note: Materials may be edited for content and length.


Journal Reference:

  1. V. I. Belotelov, I. A. Akimov, M. Pohl, V. A. Kotov, S. Kasture, A. S. Vengurlekar, Achanta Venu Gopal, D. R. Yakovlev, A. K. Zvezdin, M. Bayer. Enhanced magneto-optical effects in magnetoplasmonic crystals. Nature Nanotechnology, 2011; DOI: 10.1038/NNANO.2011.54

Cite This Page:

Technische Universitaet Dortmund. "Optical control of magnetic effects at the nanoscale." ScienceDaily. ScienceDaily, 6 June 2011. <www.sciencedaily.com/releases/2011/05/110510074444.htm>.
Technische Universitaet Dortmund. (2011, June 6). Optical control of magnetic effects at the nanoscale. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2011/05/110510074444.htm
Technische Universitaet Dortmund. "Optical control of magnetic effects at the nanoscale." ScienceDaily. www.sciencedaily.com/releases/2011/05/110510074444.htm (accessed July 30, 2014).

Share This




More Matter & Energy News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Climate Change Could Cost Billions, According To White House

Climate Change Could Cost Billions, According To White House

Newsy (July 29, 2014) A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com
Stranded Whale Watching Boat Returns to Boston

Stranded Whale Watching Boat Returns to Boston

Reuters - US Online Video (July 29, 2014) Passengers stuck overnight on a whale watching boat return safely to Boston. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Baluchistan Mining Eyes an Uncertain Future

Baluchistan Mining Eyes an Uncertain Future

AFP (July 29, 2014) Coal mining is one of the major industries in Baluchistan but a lack of infrastructure and frequent accidents mean that the area has yet to hit its potential. Duration: 01:58 Video provided by AFP
Powered by NewsLook.com
Easier Nuclear Construction Promises Fall Short

Easier Nuclear Construction Promises Fall Short

AP (July 29, 2014) The U.S. nuclear industry started building its first new plants using prefabricated Lego-like blocks meant to save time and prevent the cost overruns that crippled the sector decades ago. So far, it's not working. (July 29) Video provided by AP
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