Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nano-optics: Light moves in the right direction

12.09.2013
An experimental demonstration of light scattering controlled by silicon nanoparticles augurs well for the development of integrated optical circuits

Optical fibers are now delivering ultrafast internet connections to homes across the world. By replacing electronics-based technologies with architectures that process pulses of light, a similar leap in speed might also be possible for other forms of information handling.


Researchers can make a single silicon nanoparticle forward- or backward-scatter different colors of light, as shown in the direction denoted by ‘K’.

Copyright : 2013 A*STAR Data Storage Institute

To realize this potential, scientists must first develop novel devices that are capable of controlling the flow of light at the nanometer scale.

Such a device may now be within reach. Yuan Hsing Fu at the A*STAR Data Storage Institute and co]workers have demonstrated a unique optical effect in nanoparticles that allows them to control the direction in which visible light scatters1.

Miniaturization is key to the success of modern-day electronics: complicated circuitry must be made to fit into portable devices. Likewise, the hardware for processing optical signals must also be miniaturized. In this field, known as photonics, the design of optical components requires an entirely new approach.

The effect demonstrated by Fu and co-workers reveals how nanoparticles can be used to scatter light controllably in the visible spectral range. The researchers first designed a method to measure the scattering, and then fired light at tiny spheres of silicon. When the beam hit a sphere, some scattered backward and some scattered forward. The researchers also showed that it is possible to control the ratio of movement in the two directions by changing the diameter of the nanosphere.

Using silicon spheres with diameters of between 100 and 200 nanometers, the team observed that the amount of forward-scattered light varied from being roughly equal to the amount that was backward-scattered to being six times more intense. They also found that the effect could split the light according to wavelength: for example, nanoparticles of a particular size that backscattered predominantly green light also forward scattered mainly yellow radiation (see image).

The researchers chose silicon over the more conventional choice of a metal such as gold because it reduces energy loss and can influence both the electric and magnetic components of light. The epreferentialf scattering of radiation arises because of the mutual interaction between the electric and magnetic resonances of the nanosphere.

This effect is analogous to that of a radio-frequency antenna. gThe experimental proof of such relatively simple nano-optical systems with both an electric and magnetic response in the optical spectral range could pave the way to scaling the optical nano-antenna concept down to a single nanoparticle,h says Fu. Optical nanoscale antennas could be useful for improving solar cells and might form a crucial building block for integrated optical circuits.

The A*STAR-affiliated researchers contributing to this research are from the Data Storage Institute

References

Fu, Y. H., Kuznetsov, A. I., Miroshnichenko, A. E., Yu, Y. F. & Lukfyanchuk, B. Directional visible light scattering by silicon nanoparticles. Nature Communications 4, 1527 (2013)

A*STAR Research | Research asia research news
Further information:
http://www.research.a-star.edu.sg/research/6743
http://www.researchsea.com

More articles from Physics and Astronomy:

nachricht Astronomers release most complete ultraviolet-light survey of nearby galaxies
18.05.2018 | NASA/Goddard Space Flight Center

nachricht A quantum entanglement between two physically separated ultra-cold atomic clouds
17.05.2018 | University of the Basque Country

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>