Featured Research

from universities, journals, and other organizations

A modern twist on Young's slits

Date:
April 10, 2014
Source:
The Agency for Science, Technology and Research (A*STAR)
Summary:
A landmark experiment on wave interference from the early 1800s is revisited using gold nanoparticles. In the eighteenth century, scientists faced a conundrum: is light a wave or a particle? One of strongest pieces of evidence to support the 'wave view' -- the landmark double-slit experiment -- was reported in 1804 by the scientist Thomas Young. Young passed coherent light through two closely spaced slits and observed a set of interference fringes, a result that occurs with wave phenomena like sound or water. This observation became the basis for the modern wave theory of light.

Example of the energy flow and optical vortices found around closely spaced gold nanoparticles. The effects resemble the field lines seen in Young’s slit experiments.
Credit: Copyright : 2014 A*STAR Data Storage Institute

A landmark experiment on wave interference from the early 1800s is revisited using gold nanoparticles.

In the eighteenth century, scientists faced a conundrum: is light a wave or a particle? One of strongest pieces of evidence to support the 'wave view' -- the landmark double-slit experiment -- was reported in 1804 by the scientist Thomas Young. Young passed coherent light through two closely spaced slits and observed a set of interference fringes, a result that occurs with wave phenomena like sound or water. This observation became the basis for the modern wave theory of light.

Two hundred years later, Arseniy Kuznetsov and co-workers from the A*STAR Data Storage Institute, together with collaborators in Australia, Singapore, the United Kingdom and Russia, have performed an experiment analogous to Young's experiments but using nanoscale objects. The team studied the light scattering in the visible and near-infrared wavelength regions from a cluster of two or three closely spaced gold plasmonic nanoparticles. They observed interference and resonance effects that resemble those seen in Young's experiments.

In particular, while studying a trimer system consisting of three discrete metallic nanodisks of about 145 nanometers in diameter and 60 nanometers thick, the team found evidence for the presence of near-field, subwavelength-sized optical vortices and the circulation of electromagnetic energy (see image). This finding is very similar to what occurs to the energy flow pattern in a Young-type experiment performed with three slits.

One of the key issues in nanoplasmonics is the interaction between metallic nanoparticles at the nanoscale. "Even if the separation between two or multiple non-periodically arranged nanoparticles is of the order of wavelength, their interaction can be strong enough to change their scattering and absorption properties," notes Kuznetsov. "This can be explained by the peculiarities of the Poynting vector (energy) flow around the nanoparticles and formation of optical vortices, which produce a pattern of field lines similar to Young's classic experiment."

The team's findings, says Kuznetsov, not only expand our fundamental understanding of how light interacts with nanoclusters of metallic particles, but have both theoretical and practical applications. "They may also prove useful for applications such as improved solar cells and plasmonic biosensors." However, their most remarkable application, he suggests, may be in the emerging area of nanoantennas.

In the future, the team is aiming to study the resonant properties and interactions of nanoparticles made from nonmetallic materials. In particular, they plan to investigate high-refractive index dielectric materials such as silicon, which, unlike metallic particles, do not suffer from high optical losses.


Story Source:

The above story is based on materials provided by The Agency for Science, Technology and Research (A*STAR). Note: Materials may be edited for content and length.


Journal Reference:

  1. Mohsen Rahmani, Andrey E. Miroshnichenko, Dang Yuan Lei, Boris Luk'yanchuk, Michael I. Tribelsky, Arseniy I. Kuznetsov, Yuri S. Kivshar, Yan Francescato, Vincenzo Giannini, Minghui Hong, Stefan A. Maier. Beyond the Hybridization Effects in Plasmonic Nanoclusters: Diffraction-Induced Enhanced Absorption and Scattering. Small, 2014; 10 (3): 576 DOI: 10.1002/smll.201301419

Cite This Page:

The Agency for Science, Technology and Research (A*STAR). "A modern twist on Young's slits." ScienceDaily. ScienceDaily, 10 April 2014. <www.sciencedaily.com/releases/2014/04/140410160249.htm>.
The Agency for Science, Technology and Research (A*STAR). (2014, April 10). A modern twist on Young's slits. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2014/04/140410160249.htm
The Agency for Science, Technology and Research (A*STAR). "A modern twist on Young's slits." ScienceDaily. www.sciencedaily.com/releases/2014/04/140410160249.htm (accessed July 22, 2014).

Share This




More Matter & Energy News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Government Approves East Coast Oil Exploration

Government Approves East Coast Oil Exploration

AP (July 18, 2014) The Obama administration approved the use of sonic cannons to discover deposits under the ocean floor by shooting sound waves 100 times louder than a jet engine through waters shared by endangered whales and turtles. (July 18) Video provided by AP
Powered by NewsLook.com
Sunken German U-Boat Clearly Visible For First Time

Sunken German U-Boat Clearly Visible For First Time

Newsy (July 18, 2014) The wreckage of the German submarine U-166 has become clearly visible for the first time since it was discovered in 2001. Video provided by Newsy
Powered by NewsLook.com
Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Reuters - US Online Video (July 17, 2014) President Barak Obama stopped by at a lunch counter in Delaware before making remarks about boosting the nation's infrastructure. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

TheStreet (July 16, 2014) Oil Futures are bouncing back after tumbling below $100 a barrel for the first time since May yesterday. Jeff Grossman is the president of BRG Brokerage and trades at the NYMEX. Grossman tells TheStreet the Middle East is always a concern for oil traders. Oil prices were pushed down in recent weeks on Libya increasing its production. Supply disruptions in Iraq fading also contributed to prices falling. News from China's economic front showing a growth for the second quarter also calmed fears on its slowdown. Jeff Grossman talks to TheStreet's Susannah Lee on this and more on the Energy Department's Energy Information Administration (EIA) report. Video provided by TheStreet
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