Exceptional point-based sensing via nanostructured photonic waveguide

Parul Sharma; Brijesh Kumar; Anshuman Kumar

doi:10.1117/12.2665617

31 May 2023 Exceptional point-based sensing via nanostructured photonic waveguide

Parul Sharma, Brijesh Kumar, Anshuman Kumar

Proceedings Volume 12572, Optical Sensors 2023; 125721G (2023) https://doi.org/10.1117/12.2665617
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

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Abstract

Non-Hermitian systems with varying loss-gain profiles are receiving significant attention due to their exotic behavior at a certain point called the exceptional point (EP). EPs are singularities of non-Hermitian systems where the eigenfrequencies as well as the associated eigenstates coalesce. These EP singularities are ultrasensitive to small perturbations. A conventional system follows a linear relation with perturbation whereas these singularities follow a square root dependence for small perturbations.

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Parul Sharma, Brijesh Kumar, and Anshuman Kumar "Exceptional point-based sensing via nanostructured photonic waveguide", Proc. SPIE 12572, Optical Sensors 2023, 125721G (31 May 2023); https://doi.org/10.1117/12.2665617

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