A device that converts non-visible electromagnetic energy into light. The device includes a cylindrical electromagnetic resonator with a central through hole, a dielectric (preferably ceramic) material surrounded by symmetrically displaced through holes surrounding the central through hole. The device also includes a base and probes connected to the base. The probes are placed to introduce non-visible electromagnetic energy into the resonator. The device also includes a plasma lamp placed in the central through hole. The plasma lamp is placed to convert the non-visible electromagnetic energy into light. Preferably, the resonator is composed of a ceramic with a metalized surface except for inside the through holes. Also, a device that converts electricity into light and vice versa, a device that emits modulated light based on input modulated non-visible electromagnetic energy, and a device that emits modulated non-visible electromagnetic energy based on input modulated light, all implemented using a cylindrical electromagnetic resonator.

 
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