UVB-emitting LEDs for reptile lighting: Identifying the risks of nonsolar UV spectra.

UVB lamps are used to provide reptiles housed indoors with the UV radiation necessary to synthesize vitamin D in their skin. Since 2019, UVB-LED lamps have been on sale for use in reptile husbandry. We performed spectral analysis and mapped the UV irradiance for 18 of these lamps.

Plasmonic enhancement of second harmonic generation on metal coated nanoparticles.

Second Harmonic Generation (SHG) is a widely used tool to study surfaces. Here we investigate SHG from spherical nanoparticles consisting of a dielectric core (radius 100 nm) and a metallic shell of variable thickness. Plasmonic resonances occur that depend on the thickness of the nanoshells and boost the intensity of the Second Harmonic (SH) signal.