Parity-Time Symmetry in Laterally Coupled Bragg Waveguides

IEEE Journal of Quantum Electronics（2019）

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摘要

We investigate theoretically, in the frame of Coupled-Mode Theory (CMT), a system made of two laterally coupled, perfectly phase-matched, index-coupled Bragg waveguides, the modal gain of the amplifying one compensating exactly the modal losses of the other. Reverting to the supermode eigenbasis of the underlying “naked” (non-periodic) Parity-Time Symmetric (PTS) directional coupler, we derive ana...

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关键词

Optical waveguides,Eigenvalues and eigenfunctions,Distributed Bragg reflectors,Couplings,Resonators,TV,Directional couplers

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