Exploiting and Engineering non-Hermiticity in Photonics

The non-Hermiticity is an unavoidable feature of any photonics system based on sound models and experiments. It has been used for mapping and optimizing the Q factor of photonic modes. Here we discuss its exploitation for engineering three effects: i) exciton light traps via radiative Lamb shift, ii) Purcell effect beyond the dipole approximation and iii) shaping the Fano LDOS via engineering the cavity losses.