Micro fiber with titanium dioxide (TiO2) nanoparticles and violet light sensing

Violet light sensing of a micro fiber (MF) with cladding of titanium dioxide (TiO2) nanoparticles on the tapered region is demonstrated. The device has a sensitivity of ∼0.28 dB/mW (1520 nm), which indicates that the TiO2 holds g reat potential in photonic applications such as fiber-optic sensors or controlled Devices.