Nature Communications (Feb 2020)
Reconfigurable symmetry-broken laser in a symmetric microcavity
Abstract
The directional lasing emission in whispering gallery microcavities typically resorts to breaking the structure symmetry. Here the authors demonstrate a reconfigurable symmetry-broken microlaser in a symmetric ultrahigh-Q whispering gallery microcavity, in which a chirality of lasing fields is empowered spontaneously by nonlinear effects.