Lasing versus lasing without inversion in an optically thin gain medium near a metal surface

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Abstract

A theory of lasing in an optically thin layer of active centers disposed at a metal surface is developed from first principles. The approach is based on a rigorous account of the local field in the close vicinity of a reflective surface, which provides feedback for dipole oscillations in active centers. It is demonstrated that the gain medium thickness plays a crucial role in the lasing condition and controls switching from conventional lasing to lasing without inversion. The numerical calculations are carried out for erbium doped glass bordering a gold surface where radiation at telecom wavelength (1532 nm) can be generated.
Original languageEnglish
JournalJournal of the Optical Society of America B: Optical Physics
Volume39
Issue number9
Pages (from-to)2407-2414
ISSN0740-3224
DOIs
Publication statusPublished - 12. Aug 2022

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