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Quasiline emission solid neon for transitions between excited states

A. G. Belov, V. N. Svishchev, I. Ya. Fugol’, E. M. Yurtaeva

Published Jul 1, 1979• 2 citations
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Abstract The luminescence of Ne* centers in solid Ne is investigated. The samples are excited with synchrotron radiation in the excitonic range. By an appropriate selection of the excitation energy and by time correlated measurement of the emission spectra, overlapping luminescence bands are separated and assigned to Ne* centers in different electronic states (1P1, 3P1, 3P2) and different environments in the bulk and at the surface of the solid. Lifetime measurements and excitation spectra of spectrally selected luminescence bands support the assignments, Electronic relaxation from n ≧ 2 free excitons to the n = 1 state is found to be less effective than exciton trapping into Ne* centers. Resonance fluorescence of free Ne* atoms indicates a close connection between exciton trapping and desorption.

physica status solidi (b)•Apr 1, 1990•15 citations
We investigate the 1140 nm magnetic-dipole transition of thulium atoms trapped in solid argon and neon. These solids can be straightforwardly grown on any substrate at cryogenic temperatures, making them prime targets for surface-sensing applications. Our data are well described by a splitting of the single vacuum transition into three components in both argon and neon, with each component narrower than the 0.8 nm spectrometer resolution. The lifetime of the excited states is 14.6(0.5) ms in argon and 27(3) ms in neon, shorter than in vacuum or in solid helium. We also collected visible laser-induced fluorescence spectroscopy showing broader emission features in the range of 580--600 nm. The narrow infrared features in particular suggest a range of possible applications.
Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p ³P(0) level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous.
Abstract The luminescence of Ne* centers in solid Ne is investigated. The samples are excited with synchrotron radiation in the excitonic range. By an appropriate selection of the excitation energy and by time correlated measurement of the emission spectra, overlapping luminescence bands are separated and assigned to Ne* centers in different electronic states (1P1, 3P1, 3P2) and different environments in the bulk and at the surface of the solid. Lifetime measurements and excitation spectra of spectrally selected luminescence bands support the assignments, Electronic relaxation from n ≧ 2 free excitons to the n = 1 state is found to be less effective than exciton trapping into Ne* centers. Resonance fluorescence of free Ne* atoms indicates a close connection between exciton trapping and desorption.