New parity-time symmetric system opens up range of wavelengths to researchers, engineers wustl NatureNano
with the gain of another, coupled resonator. This special point of equilibrium is PT symmetry, and it allows for new and powerful ways to maneuver the flow and localization of energy.
Such a concept has been utilized in coupled photonic resonator systems to develop new strategies to control light flow, such as nonreciprocal light transmission. Practically, these kinds of systems are important components for radar, wireless communications and power-transfer systems. Right now, the relevant parts require large, magnetic cores."But now we can shrink them down to an integrated circuit chip the size of a fingernail," Zhang said.
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