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- W2053669771 abstract "Broad-band light-emitting color-center active waveguides induced at the surface of Lithium Fluoride, LiF, crystals bydirect writing with low-energy electron beams show great potentialities for the realization of innovative miniaturizedsolid-state light sources, optical amplifiers and lasers operating in the green-red wavelength interval under opticalpumping in the blue spectral range. Their full spectral characterization, hence the optimization of LiF-based single-modeactive waveguides, still remains a difficult task. Color-center micro-strip waveguides induced by electron-beamlithography in LiF crystals were successfully characterized via fluorescence imaging microscopy and opticaltransmittance measurements performed in a versatile spectrophotometer that can measure the transmittance throughmicrostructures down to dimensions of about 50 μm. The irradiation gave rise to the stable formation of primary andaggregate color centers within a thin surface layer of the crystal, whose refractive index is locally modified with respectto the surrounding blank material. The electronic defect volume concentrations and the wavelength-dependent refractiveindex modifications were evaluated as functions of the irradiation dose for three active micro-strips produced by 12 keVelectrons on the same LiF crystal." @default.
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- W2053669771 date "2008-04-25" @default.
- W2053669771 modified "2023-09-23" @default.
- W2053669771 title "Advanced optical characterization of broad-band light-emitting color-center strip waveguides in lithium fluoride" @default.
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- W2053669771 doi "https://doi.org/10.1117/12.780571" @default.
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