Miniaturizing Delay Lines: Quantum Spin Hall Effect for Light

Scientists are proposing a novel method for forcing photons to act like electrons. Two researchers at the Joint Quantum Institute (JQI)*, Mohammad Hafezi and Jacob M. Taylor, and two researchers at Harvard, Eugene A. Demler and Mikhail D. Lukin, propose an optical delay line that could fit onto a computer chip. Kilometers of glass fiber are easily obtained, but fabricating optical elements that can fit on a single chip creates defects that can lead to reduced transmission of information.

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