Using the finite element method and heat conduction equation, temperature, stress, end-face deformation in Tm:YAP crystal under high pump power were analyzed. Combined with gradient doping technology, an effective way to improve internal distribution of was studied. The results showed that when total 200 W, same cooling conditions, maximum temperature difference inside decreased from 58 K 25 af...

Abstract Building on recent studies of the Kelvin–Helmholtz instability (KHI) in solar atmosphere, we investigate a simple analytical model that can further our understanding how presence bulk flows influences propagation magnetohydrodynamic (MHD) waves. Our builds series works stationary MHD waveguides and looks at magnetic slab with density asymmetry, as well asymmetric background steady pres...

Light trapping in planar ultrathin-film solar cells is limited due to a small number of optical modes available in the thin-film slab. A nanostructured thin-film design could surpass this limit by providing broadband increase in the local density of states in a subwavelength volume and maintaining efficient coupling of light. Here we report a broadband metasurface design, enabling efficient and...