3D-printed non-Euclidean dye-doped microcavities emulate black hole photon spheres and demonstrate lasing at analytically computed quasinormal modes.
For example, a non-parallel upper boundary can mitigate the lasing of WGMs
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Black hole optical analogue: photon sphere microlasers
3D-printed non-Euclidean dye-doped microcavities emulate black hole photon spheres and demonstrate lasing at analytically computed quasinormal modes.