Ultraviolet photodetector using pn junction formed by transferrable hollow n-TiO_2 nano-spheres monolayer

Silicon Mach-Zehnder modulator using low-loss phase shifter with bottom PN junction formed by restricted-depth doping

A silicon Mach–Zehnder modulator with a low-loss phase shifter formed by restricted-depth doping is fabricated and characterized. The phase shifter has a PN junction at the bottom of the rib waveguide, whereas the top of the rib is un-doped. Device simulations confirm that the phase-shifter loss is reduced by 26−28% with an increased phase-shifter length to keep a π phase shift with the same bi...

Facile Hydrothermal Fabrication of Nano-Oxide Hollow Spheres using Monosaccharides as Sacrificial Templates

In the last decade, hollow materials have gained increasing attention as a special class of materials compared with their solid counterparts owing to their unique properties such as their low density, large specific surface area, stability, surface permeability, and hollow structure. These features make them important from both a scientific and technological point of view. Owing to their unique...

Nanoscale Hollow Spheres

W18O49 Nanowires as Ultraviolet Photodetector

Photodetectors in a configuration of field effect transistor were fabricated based on individual W18O49 nanowires. Evaluation of electrical transport behavior indicates that the W18O49 nanowires are n-type semiconductors. The photodetectors show high sensitivity, stability and reversibility to ultraviolet (UV) light. A high photoconductive gain of 104 was obtained, and the photoconductivity is ...

Polarization-sensitive broadband photodetector using a black phosphorus vertical p-n junction.

The ability to detect light over a broad spectral range is central to practical optoelectronic applications and has been successfully demonstrated with photodetectors of two-dimensional layered crystals such as graphene and MoS2. However, polarization sensitivity within such a photodetector remains elusive. Here, we demonstrate a broadband photodetector using a layered black phosphorus transist...