Tuning Sound and Light: Harnessing Exceptional Points for Advanced Signal Control
![The system demonstrates that frequency-detuned optical probes interacting through a shared acoustic mode are governed by a non-Hermitian matrix [latex]T[/latex], where the relationship between input [latex]\bm{A}_{\text{in}}[/latex] and scattered probes [latex]\bm{A}_{\text{out}}[/latex] is defined as [latex]\bm{A}_{\text{out}}=T\bm{A}_{\text{in}}[/latex], and the elements of this matrix are dynamically tuned by manipulating pump amplitudes, phases, and the frequency spacing between both probes and pumps.](https://arxiv.org/html/2606.04671v1/x1.png)
Researchers have demonstrated a novel platform for creating and controlling higher-order exceptional points using stimulated Brillouin scattering in a multimode optoacoustic system.