Patents by Inventor Christoph Vannahme

Christoph Vannahme has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10088428
    Abstract: A surface refractive index acquisition system for characterization of a sample is provided. The system comprises a grating device configured to receive the sample, and first and second grating regions. First and second grating periods are selected to provide optical resonances for light respectively in first and second wavelength bands. A light source is configured to illuminate part of the first and second grating regions simultaneously. An imaging system is configured to image light from the grating device and comprises an optical element focusing light in a transverse direction and being invariant in an orthogonal transverse direction, the optical element being oriented such that the longitudinal direction of the grating device is oriented to coincide with the invariant direction of the optical element, and an imaging spectrometer comprising an entrance slit having a longitudinal direction oriented to coincide with the invariant direction of the optical element.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: October 2, 2018
    Assignee: Danmarks Tekniske Universitet
    Inventors: Anders Kristensen, Christoph Vannahme, Martin Dufva
  • Publication number: 20180178571
    Abstract: There is presented a method for geometrically modifying plasmonic structures on a support structure, such as for printing or recording, said method comprising changing a geometry specifically of plasmonic structures, wherein said changing the geometry is carried out by photothermally melting at least a portion of each of the plasmonic structures within the second plurality of plasmonic structures by irradiating, the plasmonic structures with incident electromagnetic radiation having an incident intensity in a plane of the second plurality of plasmonic structures, wherein said incident intensity is less than an incident intensity required to melt a film of a corresponding material and a corresponding thickness as the plasmonic structures within the second plurality of plasmonic structures.
    Type: Application
    Filed: June 10, 2016
    Publication date: June 28, 2018
    Inventors: Xiaolong Zhu, Anders Kristensen, Emil Højlund-Nielsen, Christoph Vannahme, Niels Asger Mortensen
  • Publication number: 20170269002
    Abstract: The invention relates to a surface refractive index scanning system for characterization of a sample. The system comprises a grating device for holding or receiving the sample, the device comprising at least a first grating region having a first grating width along a transverse direction, and a second grating region having a second grating width in the transverse direction. The first grating region and the second grating region are adjacent in the transverse direction, wherein the first grating region has a grating period ?1 in a longitudinal direction, and the second grating region has a grating period ?2 in the longitudinal direction, where the longitudinal direction is orthogonal to the transverse direction. A grating period spacing ??=?1-?2 is finite.
    Type: Application
    Filed: May 8, 2015
    Publication date: September 21, 2017
    Inventors: Anders Kristensen, Christoph Vannahme, Martin Dufva
  • Patent number: 8358884
    Abstract: A microoptical component for coupling a laser light to microresonators includes at least two microresonators, each having a form of an axially symmetric body disposed on a pedestal, and at least one waveguide for the laser light. The at least two microresonators are disposed on a first substrate having first side walls. The at least one waveguide is disposed on a second substrate having second side walls. The first side walls and the second side walls are fixedly joined.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: January 22, 2013
    Assignee: Karlsruher Institut fuer Technologie
    Inventors: Tobias Grossmann, Mario Hauser, Torsten Beck, Heinz Kalt, Christoph Vannahme, Timo Mappes
  • Patent number: 8165430
    Abstract: An optical element includes a substrate having a passive waveguide and a laser waveguide disposed therein. The laser waveguide is in direct contact with the passive waveguide over a surface of contact so as to provide a butt coupling between the passive waveguide and the laser waveguide. A step extends between an upper edge of the passive waveguide and an upper edge of the laser waveguide. A covering is disposed on the passive waveguide so that the covering and the substrate together provide a cladding of lower refractive index around the passive waveguide and so that a hollow space is disposed between a lower edge of the covering and the upper edge of the laser waveguide.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: April 24, 2012
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventors: Timo Mappes, Christoph Vannahme, Mauno Schelb
  • Publication number: 20110044581
    Abstract: A microoptical component for coupling a laser light to microresonators includes at least two microresonators, each having a form of an axially symmetric body disposed on a pedestal, and at least one waveguide for the laser light. The at least two microresonators are disposed on a first substrate having first side walls. The at least one waveguide is disposed on a second substrate having second side walls. The first side walls and the second side walls are fixedly joined.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 24, 2011
    Applicant: KARLSRUHER INSTITUT FUER TECHNOLOGIE
    Inventors: Tobias Grossman, Mario Hauser, Torsten Beck, Heinz Kalt, Christoph Vannahme, Timo Mappes
  • Publication number: 20100040324
    Abstract: An optical element includes a substrate having a passive waveguide and a laser waveguide disposed therein. The laser waveguide is in direct contact with the passive waveguide over a surface of contact so as to provide a butt coupling between the passive waveguide and the laser waveguide. A step extends between an upper edge of the passive waveguide and an upper edge of the laser waveguide. A covering is disposed on the passive waveguide so that the covering and the substrate together provide a cladding of lower refractive index around the passive waveguide and so that a hollow space is disposed between a lower edge of the covering and the upper edge of the laser waveguide.
    Type: Application
    Filed: August 12, 2009
    Publication date: February 18, 2010
    Applicant: Forschungszentrum Karlsruhe GmbH
    Inventors: Timo Mappes, Christoph Vannahme, Mauno Schelb