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Since their experimental discovery in 2015, Weyl semimetals have generated a large amount of attention due their intriguing physical properties that arise from their linear electron dispersion relation and topological surface states. In particular, in the field of nonlinear (NL) optics and light harvesting, Weyl semimetals have shown outstanding performances and achieved record NL conversion coefficients...
The conduction electrons of metallic nanoparticles (NPs) exhibit collective oscillations named localized surface plasmon (LSP) that needs to be well understood aiming at various photonic applications [1]. In particular the study of the dephasing relaxation time, T2, of the LSP is important because the local electromagnetic field enhancement in the vicinity of the NPs is proportional to T2, which depends...
Quasi-1D random laser action is obtained in the liquid core of a photonic crystal fiber composed of a rutile-particle suspension in a rhodamine solution. Substantial improvement in efficiency is demonstrated in this novel laser geometry.
We present recent results on frequency upconversion (UPC) obtained in fluoroindate glasses (FIG) doped with Ho 3+ , Tm 3+ and Nd 3+ ions and codoped with Pr 3+ /Nd 3+ and Yb 3+ /Tb 3+ ions. The results for the Ho 3+ -doped samples show strong evidence of energy transfer (ET) between Ho 3 ...
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