Any attempt to study matter in extreme conditions encounters severe issues connected with non-linear intensity-dependent phenomena naturally occurring in the interaction process. For the purposes of such fundamental experiments, the laser beam must be well pre-defined before and/or rather well characterized after the irradiation since the non-Gaussian nature of almost all the XUV/X-ray laser beams is responsible for parasitic non-linear effects in the experimental results...
Stochastic quasi-phase-matching of the process of spontaneous parametric down-conversion is analyzed. It is shown that spectral, temporal and spatial properties of photon pairs generated in randomly poled crystals are similar to those generated in chirped periodically-poled crystals. Especially, randomly poled crystals are capable to emit photon pairs with ultra-broad spectra. For possible applications, the production of randomly poled nonlinear crystals would be much...
Diamond is recognized as an attractive material for merging solid-state and biological systems. The advantage of diamond field-effect transistors (FET) is that they are chemically resistant, bio-compatible, and can operate without gate oxides. Solution-gated FETs based on H-terminated nanocrystalline diamond films exhibiting surface conductivity are employed here for studying effects of fetal bovine serum (FBS) proteins and osteoblastic SAOS-2 cells on diamond electronic...
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