One of the most notable property of non-Hermitian systems is the emergence of spectral degeneracies known as exceptional points where complex eigenvalues and the corresponding eigenstates of the system coalesce. The presence of an exceptional point affects the system’s behavior significantly, leading to nontrivial physics with interesting features. In this talk, I will present the progress in our experimental and theoretical studies towards a better understanding of the control of light and its interaction with matter at exceptional points for realizing photonic and phononic devices with novel functionalities.
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