Exceptional points in integrated mode-converting multi-mode Fabry Pérot resonators

Exceptional points are bifurcations in parameter space of non-Hermitian systems where both their eigenvalues and corresponding eigenvectors coalesce, leading to unique phenomena. Past works have demonstrated exceptional points in coupled systems as well as a single system with finely-controlled nano-scale perturbation. To demonstrate exceptional points on a single-component platform without nano-scale control, we are proposing integrated mode-converting multimode Fabry Pérot resonators. We aim to locate exceptional points in this novel photonics device. And we expect our work to find applications in advanced sensing systems and to be applied to active systems --- such as quantum-well lasers --- to explore coherent exceptional points phenomena using an internally-generated laser field.