OPTICAL MICROCAVITIES BASED ON COLOR CENTERS IN LiF FILMS: NEW SOLID STATE MINIATURIZED LIGHT SOURCES

摘要

Recent investigations have demonstrated the relevance of the emission properties of laser active color centers (CCs) in lithium fluoride (LiF) films to design new miniaturized solid state sources. Among them, optical microcavities hold technological promises for the realization of all-solid, low-threshold, high-directional emitters and lasers. The peculiar structure of the microcavities changes the characteristics of local electromagnetic field and consequently the spatial, spectral and temporal properties of the active center emissions. In this work we will show significant changes in the emission behavior of F_2 CCs in LiF films placed inside a microcavity, i.e. light intensity enhancement, spectral narrowing, spatial redistribution and alteration of spontaneous decay time, as compared to a no-cavity structure.