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Home > Press > Research opens door to smaller, cheaper, more agile communications tech

Routing of light in a liquid crystal by a magnetic field (B). The orientation of the field determines the orientation of rod-shaped molecules of the liquid crystal and defines direction of the light trajectory. This trajectory can be rapidly changed by changing the orientation of the magnetic field.
CREDIT
ANU
Routing of light in a liquid crystal by a magnetic field (B). The orientation of the field determines the orientation of rod-shaped molecules of the liquid crystal and defines direction of the light trajectory. This trajectory can be rapidly changed by changing the orientation of the magnetic field. CREDIT ANU

Abstract:
Research led by The Australian National University (ANU) on the use of magnets to steer light has opened the door to new communications systems which could be smaller, cheaper and more agile than fibre optics.

Research opens door to smaller, cheaper, more agile communications tech

Canberra, Australia | Posted on February 16th, 2017

Group leader Professor Wieslaw Krolikowski from the ANU Research School of Physics and Engineering (RSPE) said the team's breakthrough would be crucial for developing tiny components to process huge amounts of data.

"This technology is also expected to be applicable in sensors, data storage and liquid crystal displays," said Professor Krolikowski.

Today's communication technologies aim to maximise data transmission rates and require the ability to precisely direct information channels. These technologies use electronic components for signal processing such as switching, which is not as fast as light-based technology including fibre optics.

Professor Krolikowski said the team used a magnetic field to stimulate liquid crystals and steer light beams carrying data, which enables an innovative approach to data processing and switching.

"Our discovery could lead to communications technology that could power a new generation of efficient devices such as compact and fast optical switches, routers and modulators," he said.

Co-researcher Dr Vladlen Shvedov from RSPE said the team's innovation, based on liquid crystals with properties modified by light, promised a much more agile system than fibre optics.

"This touch-free magneto-optical system is so flexible that you can remotely transfer the tiny optical signal in any desired direction in real time," Dr Shvedov said.

Co-researcher Dr Yana Izdebskaya from RSPE said while the innovation was in the early stages, it was highly promising for future communications technology.

"In the liquid crystal the light creates a temporary channel to guide itself along, called a soliton, which is about one tenth the diameter of a human hair. That's about 25 times thinner than fibre optics," Dr Izdebskaya said.

"Developing efficient strategies to achieve the robust control and steering of solitons is one of the major challenges in light-based technologies."

Dr Izdebskaya said controlling solitons in liquid crystals had only been achieved by applying voltage from inflexible electrodes.

"Such systems have been restricted by the configuration of electrodes in a thin liquid crystal layer. Our new approach doesn't have this limitation and opens a way to full 3D manipulations of light signals carried by solitons," Dr Izdebskaya said.

####

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