TiO2 nanophotonic waveguides for on-chip nonlinear optical devices, at Photonics West 2012 (San Francisco, CA), Monday, January 23, 2012:
    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
    Maximizing intensity in TiO2 waveguides for nonlinear optics, at Photonics West (San Francisco, California), Wednesday, February 6, 2013:
    Titanium dioxide (TiO2) represents an attractive candidate for nonlinear optical devices due its high transparency, large refractive index, and large Kerr nonlinearity. Using electron beam lithography and a liftoff procedure, we can structure both amorphous TiO2 as well as polycrystalline anatase thin films to create photonic devices that exploit the material’s properties in order to do nonlinear optics. Nonlinear optics benefit from long interactions, necessitating large intensities along long waveguide lengths. For this reason, waveguide losses need to be minimized. We study the effects... Read more about Maximizing intensity in TiO2 waveguides for nonlinear optics
    Nonlinear optics in on-chip zero-index metamaterials, at Engineering Physics seminar, Universite de Montreal (Montreal, QC, Canada), Monday, November 23, 2015:
    Optical metamaterials - composite materials whose electromagnetic properties are finely engineered by designing their constituents - have been shown to exhibit strange and exotic properties, such as negligible or negative indices of refraction and the direct control of the amplitude and phase of light. These properties have been used for innumerable applications, such as flat lenses, invisibility cloaks as well as previously unseen nonlinear interactions. Recently, our group has demonstrated the first on-chip metamaterial with a refractive index of zero. These isotropic structures exhibit a... Read more about Nonlinear optics in on-chip zero-index metamaterials
    Nonlinear Phase-Matching in 2D Integrated Zero-Index Metamaterials, at MRS: Optical Metamaterials - From New Plasmonic Materials to Metasurface Devices (Boston, MA), Wednesday, December 2, 2015:
    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
    Phase-Matching in Dirac-Cone-Based Zero-Index Metamaterials, at CLEO: Science and Innovations (San Jose, CA), Sunday, June 5, 2016:
    Using nonlinear scattering theory, we simulate nonlinear signal generation in 2-dimensional zero-index metamaterials based on a photonic Dirac cone at the G point. We observe unique phase-matching in multiple simultaneous directions as the index approaches zero.