Navigation Links
Optical boomerangs, ultralight fractal materials, and more
Date:11/13/2012

Optical Boomerangs

P. Aleahmad et al.

Physical Review Letters (forthcoming)

P. Zheng et al. Physical Review Letters, 109, 193901 (2012)

Bending light around corners is usually done with mirrors, but now scientists have realized self-bending light beams that propagate along curved paths.

Two independent groups have reported experiments on special light waves that can skid around curves. The researchers demonstrated that modified laser beams can be made to move along parabolic and elliptical paths. Furthermore, if obstacles are in their path, these beams can self-heal, regrouping and continuing on their way. The research shows that such self-bending behavior can be achieved in both two and three dimensions. These sort of "optical boomerangs" could be used to move particles around with laser tweezers, or to manipulate optical data on an optoelectronic chip.


Ultralight Fractal Materials

Daniel Rayneau-Kirkhope, Yong Mao (contact author), Robert Farr Physical Review Letters (forthcoming)

Researchers have studied theoretically how ultralight materials can be built based on a fractal design: a geometry whose patterns look the same when observed at different scales.

Their design strategy is based on a hierarchical approach: elementary units are first assembled that can be used as building blocks for the next level of assembly. The resulting structures, reminiscent of the metal frame of the Eiffel Tower, are to a large extent hollow, yet they are predicted to retain the same mechanical properties of standard materials. The scheme is particularly suited to design large structures with limited load, such as solar sails that propel spacecrafts, whose weight may be reduced by a factor of 100 or more.


Meson Decay Shows the Arrow of Time

Jean-Pierre Lees et al.

Physical Review Letters (forthcoming)

By measuring the decay of certain subatomic particles called B- mesons, scientists have found the first evidence that, even at the microscopic level, time flows in a preferred direction.

While most things in the macroscopic world only get older, many of the fundamental laws of physics are perfectly time-symmetric: according to the standard model most physical process can be "rewound" to go exactly back to where they started. According to theory, an exception is the electroweak interaction, the force responsible for the radioactive decay of nuclear subatomic particles. The BaBar collaboration at the SLAC National Acceleration Laboratory at Stanford has now proven this experimentally. BaBar compared the decay of B-mesons, running the process in both the forward and backward direction. The result showed that the decay is different in the two cases, providing the first direct experimental evidence for the violation of time reversal symmetry.


'/>"/>

Contact: Matteo Rini
mrini@aps.org
631-591-4224
American Physical Society
Source:Eurekalert

Related biology news :

1. Optical waveguide connects semiconductor chips
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/2/2016)... The Department of Transport Management (DOTM) of ... Dollar project, for the , Supply and Delivery ... IT Infrastructure , to Decatur ... Identity Management Solutions. Numerous renowned international vendors participated in the ... was selected for the most compliant and innovative solution. The ...
(Date:6/1/2016)... June 1, 2016 Favorable Government ... Administration and Criminal Identification to Boost Global Biometrics System ... released TechSci Research report, " Global Biometrics Market ... Forecast and Opportunities, 2011 - 2021", the global biometrics ... 2021, on account of growing security concerns across various ...
(Date:5/16/2016)... May 16, 2016   EyeLock LLC , a ... the opening of an IoT Center of Excellence in ... expand the development of embedded iris biometric applications. ... of convenience and security with unmatched biometric accuracy, making ... aside from DNA. EyeLock,s platform uses video technology to ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® Inc. (RCA), ... free webinar on Performing Quality Investigations: Getting to Root Cause. ... no charge. , Incomplete investigations are still a major concern to the Regulatory ...
(Date:6/23/2016)... , June 22, 2016  Amgen (NASDAQ: ... the QB3@953 life sciences incubator to accelerate ... The shared laboratory space at QB3@953 was created to ... key obstacle for many early stage organizations - access ... the sponsorship, Amgen launched two "Amgen Golden Ticket" awards, ...
(Date:6/22/2016)... 22, 2016 Cell Applications, Inc. and ... to produce up to one billion human induced ... one week. These high-quality, consistent stem cells enable ... and spend more time doing meaningful, relevant research. ... high-volume manufacturing process that produces affordable, reliable HiPSC ...
(Date:6/22/2016)... 22, 2016  According to Kalorama Information, the ... (NGS) market include significant efforts in automation as ... accessible and affordable sequencers, say the healthcare market ... consumables including sample prep materials.  The healthcare market ... Preparation for Next Generation Sequencing (NGS) , highlights ...
Breaking Biology Technology: