23 research outputs found
Photonics for Smart Cities
We review the current applications of photonic technologies to Smart Cities. Inspired by the future needs of Smart Cities, we then propose potential applications of advanced photonic technologies. We find that photonics already has a major impact on Smart Cities, in terms of smart lighting, sensing, and communication technologies. We further find that advanced photonic technologies could lead to vastly improved infrastructure, such as smart water‐supply systems. We conclude by proposing directions for future research that will have the greatest impact on realizing Smart City initiatives
On observation of dispersion in tunable second-order nonlinearities of silicon-rich nitride thin films
We present experimental results on second-harmonic generation in
non-stoichiometric, silicon-rich nitride (SRN) films. The as-deposited film
presents a second-order nonlinear coefficient, or \c{hi}(2), as high as 8pm/V.
This value can be widely tuned using the electric field induced second harmonic
effect (EFISH), and a maximum value of 22.7pm/V was achieved with this
technique. We further illustrate that the second-order nonlinear coefficient
exhibited by these films can be highly dispersive in nature, and requires
further study and analysis to evaluate their viability for in-waveguide
applications at telecommunication wavelengths