Special Issue on the 60^(th)anniversary of the first laser-Series I:Microcavity Photonics-from fundamentals to applications

Optical microcavities confine light to small volumes by resonant recirculation.Because of their ultrahigh quality factors(Q)and small mode volumes(Vm),optical microcavities have attracted strong research interests for their unique property of significantly enhancing light-matter interaction.1 In recent decades,optical microcavities have become cornerstones for a wide range of studies and applications。