Intense recombination radiation and room-temperature lasing in CdS excited by high-voltage rf current pulses

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Abstract
Intense recombination radiation has been observed in CdS crystals along certain crystallographic planes when excited by short high-voltage rf pulses applied through an electrical contact. The addition of high-reflectivity dielectric mirrors provides a Fabry-Perot cavity in which pulsed lasing occurs at room temperature. Some mechanisms are suggested for the new form of high-density excitation, and possible implications are discussed.