Fig. 1. a, Conceptual illustration of the strain tunable single-photon source. b, Structure of the integrated FP microcavity and electric field distribution of fundamental mode. c, 3D-FDTD simulation ...

It was not too long ago that basic science lectures began with the three forms of matter: gases, liquids and solids—and somewhere along the line plasmas were occasionally added to the list. But to be ...