light

07/01/2014 - 20:28

Researchers at the National Institute of Standards and Technology (NIST) have built a silver, glass and chromium nanostructure that can all but stop visible light cold in one direction while giving it a pass in the other.

 

05/18/2014 - 12:00

The new research, published in Nature Photonics, shows for the first time how Breit and Wheeler's theory could be proven in practice. This 'photon-photon collider', which would convert light directly into matter using technology that is already available, would be a new type of high-energy physics experiment. This experiment would recreate a process that was important in the first 100 seconds of the universe and that is also seen in gamma ray bursts, which are the biggest explosions in the universe and one of physics' greatest unsolved mysteries.

 

04/07/2014 - 08:09

Motor neuron disease or central nervous system injury can lead to loss of essential voluntary muscle activity such as speaking, walking, breathing, and swallowing due to defects in motor neurons. A new study published on 4th April in the journal Science describes a method for bypassing the defective central motor circuit using engrafted, light-activated motor neurons. The study in mice was led by researchers in University College London (UCL) and King’s College London and offers hope for treatment of paralysis and breathing difficulties in these devastating conditions.

 

04/01/2014 - 09:33

Scientists now present a protein that facilitates the control of nerve cells by light. It might be used as a basis of studies of diseases of the nervous system. The ChlocC channelrhodopsin presented now reacts about 10,000 times more sensitively to light than other proteins used so far for switching off nerve cells.

 

03/27/2014 - 14:36

Light waves can be defined by three fundamental characteristics: their color (or wavelength), polarization, and direction. While it has long been possible to selectively filter light according to its color or polarization, selectivity based on the direction of propagation has remained elusive.

 

03/10/2014 - 10:18

A team of MIT researchers has used a novel material that’s just a few atoms thick to create devices that can harness or emit light. This proof-of-concept could lead to ultrathin, lightweight, and flexible photovoltaic cells, light emitting diodes (LEDs), and other optoelectronic devices, they say.