Sensing with exceptional points in coupled resonator or waveguide systems

Filippo Capolino

doi:10.1117/12.2657395

9 March 2023 Sensing with exceptional points in coupled resonator or waveguide systems

Filippo Capolino

Proceedings Volume PC12447, Quantum Sensing, Imaging, and Precision Metrology; PC1244724 (2023) https://doi.org/10.1117/12.2657395
Event: SPIE Quantum West, 2023, San Francisco, California, United States

Abstract

The physics of exceptional points leads to very high sensitivity because the perturbation of an exceptionally degenerate state is highly sensitive to a system’s perturbation. This property is indeed not shared with nondegenerate systems, and it relies in the fractional power expansion (Puiseux series) describing the perturbation of eigenvalues and eigenvectors. We discuss how this property is met in systems made of coupled resonators and with coupled modes in waveguides, whose eigenvalues are the resonant frequencies and the wavenumbers, respectively. We will also discuss the experimental implementation of this principle in unstable nonlinear systems to build extremely sensitive saturated oscillators.

Conference Presentation

Citation Download Citation

Filippo Capolino "Sensing with exceptional points in coupled resonator or waveguide systems", Proc. SPIE PC12447, Quantum Sensing, Imaging, and Precision Metrology, PC1244724 (9 March 2023); https://doi.org/10.1117/12.2657395

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