(University of the Witwatersrand) Using geometric phase inside lasers for the first time, researchers find a way to change the orbital angular momentum of laser beams.
Optics & Photonics
Mar 15, 2016
0
89
(Phys.org) —A group of researchers at Macquarie University has shown that circular dichroism – a differential absorption of the circular polarization light – can be induced in mirror symmetric samples such as circular ...
Optics & Photonics
Sep 15, 2014
0
0
(Phys.org)—At a time when communication networks are scrambling for ways to transmit more data over limited bandwidth, a type of twisted light wave is gaining new attention. Called an optical vortex or vortex beam, this ...
Optics & Photonics
Jan 8, 2013
6
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Vortex beams, rotating like a tornado, offer completely new possibilities for electron microscopy. A method of producing extremely intense vortex beams has been discovered at the Vienna University of Technology (TU Vienna).
General Physics
Nov 5, 2012
2
0
(Phys.org)—Will humans ever control lightning? Could we make the invisible visible, and vice versa?
General Physics
Sep 12, 2012
0
0
Whether a car or a ball, the forces acting on a body moving in a straight line are very different to those acting on one moving in tight curves. This maxim also holds true at microscopic scales. As such, a beam of electrons ...
General Physics
Feb 17, 2012
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0
Researchers from the University of York are pioneering the development of electron microscopes which will allow scientists to examine a greater variety of materials in new revolutionary ways.
General Physics
Feb 16, 2012
0
0
(PhysOrg.com) -- For more than 40 years, scientists have been using the radiation pressure of light to move and manipulate small objects in space. But until now, the movements have always been restricted to very small scales, ...
A team of EU-funded scientists has come up with a way of generating rotating electron beams. The technique, described in the journal Nature, could be used to probe the magnetic properties of materials and could even be applied ...
General Physics
Sep 17, 2010
3
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