title: Direct laser writing for nanoporous liquid core laser sensors.
abstract: We report the fabrication of nanoporous liquid core lasers via direct laser writing based on two-photon absorption in combination with thiolene-chemistry. As gain medium Rhodamine 6G was embedded in the nanoporous polybutadiene matrix. The lasing devices with thresholds of 19 µJ/mm(2) were measured to have bulk refractive index sensitivities of 169 nm/RIU at a laser wavelength of 600 nm, demonstrating strongly increased overlap of the modes with the analyte in comparison to solid state evanescent wave sensors.
authors.affiliation: Institute of Applied Physics and DFG Center for Functional Nanostructures CFN, Karlsruhe Institute of Technology KIT, 76128 Karlsruhe, Germany. tobias.grossmann@kit.edu
authors.forename: Tobias
authors.initials: T
authors.lastname: Grossmann
authors.forename: Mads Brøkner
authors.initials: MB
authors.lastname: Christiansen
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Peterson
authors.forename: Heinz
authors.initials: H
authors.lastname: Kalt
authors.forename: Timo
authors.initials: T
authors.lastname: Mappes
authors.forename: Anders
authors.initials: A
authors.lastname: Kristensen