A compact ultraviolet-B (UV-B) semiconductor laser diode emitting at 318 nm under continuous-wave operation at room-temperature. The device demonstrates stable UV-B lasing on a low-cost sapphire ...
The UV index measures the intensity of skin-damaging ultraviolet radiation at the Earth's surface. The UV index ranges from 0 to 11-plus, with higher values indicating greater risk of sunburn and skin ...