Presentations

Titanium dioxide (TiO2) is a promising material for nonlinear photonic applications. Its large bandgap (> 3 eV) means it is highly transparent and has minimal two photon absorption over a wide wavelength range. TiO2’s high linear and nonlinear refractive indices (> 2 and 25 × that of silica at 800 nm, respectively) allow for high optical confinement in nanophotonic structures, such as waveguides, photonic crystals and resonators, and efficient nonlinear interactions. Thus, TiO2 is a potential platform for on-chip nonlinear optical devices operating across the three traditional... Read more about TiO2 nanophotonic waveguides for on-chip nonlinear optical devices

Nonlinear optics play an important role in many applications in photonics and quantum optics, such as in frequency conversion, sensing, and entangled-photon generation. The strong field confinement obtained by the transition to an integrated platform has led to unprecedented nonlinear figures of merit and the miniaturization of nonlinear devices. However, phase-matching remains an essential component to nonlinear processes and represents a significant obstacle, with many different free-space and on-chip techniques being developed to circumvent its constraints. Recently, a 1-dimensional... Read more about Nonlinear Phase-Matching in 2D Integrated Zero-Index Metamaterials

We fabricate and characterize integrated polycrystalline anatase TiO2 micro-ring resonators at around λ = 1550 nm. We obtain quality factors of 1.5×10^4 and calculate a propagation loss of 8.0 ± 1.3 dB/cm.