,
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The only part of each waveguide that did not cancel out light was its outer edge. As a result,
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, photons got steered along the outside of the bundle of waveguides,
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, confining them to the surface of the glass block.

When the researchers shined a beam of red light on one face of the glass, the photons moved along the surface of the glass, easily made a turn once they reached an edge of the glass and then continued on their way along the surface. None of the light got scattered by surface imperfections.

Segev says his team’s photonic topological insulator will lead to improved optical transmissions. Jacob Taylor,
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, a physicist at the University of Maryland’s Joint Quantum Institute,
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, adds that the impressive light-harnessing properties of the group's creation could allow people to send more data over a popular type of wire known as multi-mode optical fiber.

Taylor has similar applications in mind for a photonic topological insulator his team is creating. While the structure of his team’s material is not as simple as Segev’s,
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, it is made of silicon-based components like the ones widely used in the telecommunications industry.

Segev expects many more examples in coming months. “There were a number of groups competing to try to achieve this,
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,” he says. “We’re happy to have won the race.”
Thu,
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, 11 Apr 2013 13:30:03 +0000 https://www.sciencenew...onfirms-hints-dark-matter


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