schematic chiral light (IMAGE)
Caption
The chiral system behaves differently depending on which direction light enters. When light enters clockwise (right), some is absorbed, the rest continues to the mirror. It reflects toward its original direction, reentering the resonator, coupling over the clockwise input, and creating the ripple-like field distribution called a standing wave pattern. The absorption lineshape then appears as squared Lorentzian (flat top). When light enters the resonator counterclockwise (left), some light is absorbed, but most exits the system. Since it does not reenter the resonator, only counterclockwise light propagates, resulting in a traveling wave. The measured absorption exhibits a Lorentzian lineshape.
Credit
SOLYEMANI AND ŞAHIN ÖZDEMIR/PENN STATE
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