Fig. 1: Surface Dyakonov-Cherenkov radiation.
From: From Dyakonov-Cherenkov radiation to Dyakonov surface optics

a Schematics of surface Dyakonov-Cherenkov radiation. A swift charged particle moving in a structure made of semi-infinite isotropic and birefringent material excites Dyakonov surface waves, leading to surface Dyakonov-Cherenkov radiation. b Radiation pattern of surface Dyakonov-Cherenkov radiation. (Reproduced with permission from ref. 7 Copyright 2021, Nature Publishing Group.)