Presentations

    Femtosecond laser nanofabrication of metal structures through multiphoton photoreduction, at Photonics West (San Francisco, CA), Tuesday, January 25, 2011:
    We present an ultrafast laser technique for direct-writing gold and silver structures of tunable dimensions. By utilizing nonlinear optical interactions between chemical precursors and femtosecond pulses, we limit metal-ion photoreduction processes to focused spots smaller than that of the diffraction-limit. This creates metal nanostructures in a focal volume that can be rapidly scanned in 3D. By varying the solution chemistry and laser pulse parameters, we demonstrate morphological control of the resulting structures. We fabricate grid and woodpile patterns over hundreds of micrometers in... Read more about Femtosecond laser nanofabrication of metal structures through multiphoton photoreduction
    Three-dimensional silver nanostructure fabrication through multiphoton photoreduction, at Photonics West 2012 (San Francisco, CA), Tuesday, January 24, 2012:
    We present an ultrafast laser technique for 3D direct-writing silver nanostructures embedded in a dielectric. We induce the photoreduction of silver ions through non-linear absorption in a solution doped with silver salts. Nonlinear optical interactions between the chemical precursors and femtosecond pulses limit silver-ion photoreduction processes to a focused volume smaller than that of the diffraction-limit. Our technique creates dielectric-supported silver structures, enabling the nanofabrication of silver patterns with disconnected features in 3D. We obtain sub-300 nm resolution and... Read more about Three-dimensional silver nanostructure fabrication through multiphoton photoreduction
    Fabrication of Structured Nanocomposite Materials for Three-Dimensional Metamaterial Applications, at MRS Fall Meeting 2012 (Boston, MA), Wednesday, November 28, 2012
    Fabrication of Structured Nanocomposite Materials for Three-Dimensional Metamaterial Applications We present a technique that combines top-down and bottom-up nanofabrication approaches to create a structured nanocomposite material. The structured nanocomposite material consists of three-dimensional (3D) silver nanostructures embedded inside a doped polymer matrix. The positioning of silver structures within the matrix is controlled via femtosecond laser irradiation. The key is to use a material combination that yields a stable background dielectric matrix while allowing nanostructure growth... Read more about Fabrication of Structured Nanocomposite Materials for Three-Dimensional Metamaterial Applications