Navigation Links
Shining a light around corners
Date:6/16/2010

We learned in science class that light beams travel in straight lines and spread through a process known as diffraction and they can't go around corners. But now researchers at Tel Aviv University are investigating new applications for their recent discovery that small beams of light can indeed be bent in a laboratory setting, diffracting much less than a "regular" beam.

These rays, called "Airy beams," were named after English astronomer Sir George Biddell Airy, who studied the parabolic trajectories of light in rainbows, and were first created at the University of Central Florida. Now, the fortuitously-named Prof. Ady Arie and his graduate students Tal Ellenbogen, Noa Voloch-Bloch, Ayelet Ganany-Padowicz and Ido Dolev of Tel Aviv University's Faculty of Engineering have demonstrated new ways to generate and control Airy beams. Employing new algorithms and special nonlinear optical crystals, their research is reported in a recent issue of the scientific journal Nature Photonics.

Some of these new applications, such as a light source to generate beams that can turn around corners, or lighted spaces that contain no apparent light source, are still five or ten years away, says Prof. Arie. But his research has immediate applications as well. For example, because small particles are attracted to the highest intensities of a beam, the pharmaceutical and chemical industries can use the new beam to sort molecules according to size or quality, filtering impurities from drug formulations that might otherwise lead to toxicity and death.

A light that can twist around curves

Until now, reports an editorial review in the same issue of Nature Photonics, Airy beams have been generated through "linear diffraction" using tools that project a single color of light through glass plates of varying thicknesses. But using crystals they built in the lab, Tel Aviv University's approach uses another technique: nonlinear optics. Sent through crystals, light waves bounce inside the crystal, changing their wavelength and color. It is through this process, the researchers say, that the door is opened for creating new light beams at new wavelengths with greater control of their trajectories.

"We've found a way to control whether an Airy beam curves to the left or to the right, for example," says Prof. Arie. He has also found a way to control the peak intensity location of the beams, which are generated through a nonlinear optical process.

Nonlinear optics is a sub-field of optics that deals with the response of materials to high intensities of light. The strong interaction between light and material results in the generation of new colors, which are half the wavelength of the original input light frequency. For example, a nonlinear response to infrared light can generate visible light ― which is how those bright, green "laser pointers," often used in presentations given in large rooms, generate their light.

Airy beams promise remarkable advances for engineering. They could form the technology behind space-age "light bullets" as effective and precise defense technologies for police and the military, but also as a new communications interface between transponders. As tiny, tight packets of information, these Airy beams could be used out in the open air, researchers hope.


'/>"/>

Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert  

Related medicine news :

1. VHI Releases Annual Industry Report - Highlights Hospital, Nursing Facility Efficiency
2. Review Spotlights Clues to Serious Childhood Infection
3. New Red Cross PSA Highlights Haiti Relief and Features Music by John Mayer
4. Entest BioMedical Enters into LOI with Advanced Light Devices to Develop Laser Platform for Stem Cell / Laser COPD Treatment
5. President Obama Highlights Bipartisan Policy Center Health Care Reform Plan in Remarks to House Republicans
6. New Report and Survey Findings Highlight Why More Women Die From Heart Disease Than Men
7. Study highlights lack of patient knowledge regarding hospital medications
8. Major Imaging Initiative to Shed Light on Little Known Brain Disease
9. Eyre Bus, Tour & Travel Donates Bus to Transport Medical Professionals from D.C. Area to New York for Flight to Haiti, Announces the Greater Washington Haiti Relief Committee and the Embassy of Haiti
10. Scientists shed new light on walking
11. Rainbow Light Introduces EcoGuard Sustainable Packaging
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Shining a light around corners
(Date:10/13/2017)... , ... October 13, 2017 , ... Many families have ... many long-term care insurance companies have a waiver for care if the client has ... period, when the family pays for care, is often waived, so the benefits from ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... ... will be giving viewers the lowdown on sciatica in a new episode of ... that focuses on current events and innovation and investigates each subject in-depth with ...
(Date:10/12/2017)... ... October 12, 2017 , ... CitiDent ... sleep apnea using cutting-edge Oventus O2Vent technology. As many as 18 million ... by frequent cessation in breathing. Oral appliances can offer significant relief to about ...
(Date:10/12/2017)... ... October 12, 2017 , ... Asante, ... post-acute health care, have expanded their existing home health joint venture through an ... has been operating a joint venture home health company with Asante, delivering clinically ...
(Date:10/12/2017)... FL (PRWEB) , ... October 12, 2017 , ... On ... holding a treadmill relay – Miles by Moonlight to raise money for the American ... $300 or more. , Teams will work together to keep their treadmills moving ...
Breaking Medicine News(10 mins):
(Date:10/10/2017)... 10, 2017  NDS received FDA 510(k) clearance in May 2017 ... display stand specifically designed for endoscopy environments. An innovative secondary monitor ... clinical solution to support the improvement of patient outcomes, procedural efficiency, ... ... ...
(Date:10/4/2017)... 4, 2017  According to the Centers for Disease Control and Prevention ... . PhysicianOne Urgent Care is helping communities across Massachusetts ... , by offering no-cost* flu shots through the end of the month. ... health insurance regulations. ... to get a flu shot is by the end of October, according ...
(Date:10/2/2017)... Labs announces the European launch of their new low volume, high ... in Cambridge, U.K on October 4th. The ... with unprecedented speed and sensitivity while using far less sample volume ... ... ...
Breaking Medicine Technology: