Objective
The current cooperation in laser spectroscopy would be broadened to include a comprehensive experimental and theoretical study of the MPR processes which affect the optically excited state of promising laser materials.
The proposed research would combine the expertise of the involved investigators in laser spectroscopy of RE doped laser materials with the state-of-the-art experimental facilities. Investigation of the multiphonon relaxation of the energy of electronic excitations in bromide, chloride, fluoride, and oxide laser crystals and glasses doped with rare earth ions such as Pr3+, Nd3+, Er3+, Tm3+ and Ho3+ will receive primary consideration.
We plan to perform a systematic investigation of the regularities of multiphonon relaxation. Among them are the functional dependence:
on the number of phonons n involved in the transition;
on the number of phonons n involved in the transition;
on the type and spectral density of the phonon states of the crystal
lattice;
on the lattice structure;
on the type of cations and anions of the laser host;
on the type of rare earth ion, its ionic radius, and spatial extension of
the wave functions of the 4f states;
on the type of 4f-4f electronic transition;
on the type of the optical center in crystals with multi-site structure; and we will study :
the influence of disorder of the lattice structure and of high-frequency
quasi-local phonons;
the role of quasi-mollar vibrations like WO4, MoO4, VO4, CO3, OH, NO3,
etc. ;
the influence of the Stimulated Raman Scattering (SRS) oscillation on the
multiphonon relaxation rate;
The dependence of the nonradiative relaxation rate on the excitation intensity will be investigated. The study of lattice exciton mediated nonradiative transitions of dopant ions in solids will be performed.
This proposal is expected to uncover currently unknown regularities of the multiphonon relaxation behavior in rare- earth doped laser crystals. It will help to predict the laser and optical properties of solid state laser media.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Coordinator
92225 Bagneux
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.