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Minimally asymmetric state conversion around exceptional singularities in a specialty optical microcavity
A. Laha, A. Biswas,
Published in IOP Publishing Ltd
Volume: 21
Issue: 2
Exploiting scattering matrix (S-matrix) formalism, a unique route for manipulating the exceptional points (EPs) has been reported in a trilayer open optical microcavity with non-uniform real refractive index. The boundaries of the intermediate index layer are appropriately tapered. The cavity is partially pumped by a transverse distribution of a balanced gain-loss profile. With the strict restriction of balanced gain-loss, controlling infinitesimally small variation of gain-coefficient with simultaneous tapering parameter an EP has been encountered; which is being encircled in cavity parameter space to study dynamics of the coupled states around the EP in the context of robust selective flip-of-state phenomena with lower-asymmetry in state conversion efficiencies. Such a specialty trilayer microcavity with tunable width is reported for the first time; which turns out to be a specific approach to achieve maximum efficiency in conversion with minimum asymmetry. Considering suitable state-of-the-art techniques, this exclusive proposal may open up a fabrication feasible platform for device level implementation of system control exploiting EPs. © 2019 IOP Publishing Ltd.
About the journal
JournalData powered by TypesetJournal of Optics (United Kingdom)
PublisherData powered by TypesetIOP Publishing Ltd
Open AccessNo