Patents by Inventor David Grojo

David Grojo 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).

  • METHOD FOR OPTICAL WRITING IN A SEMICONDUCTOR MATERIAL, CORRESPONDING COMPUTER PROGRAM PRODUCT, STORING MEDIUM AND WRITING DEVICE
    Publication number: 20240342826
    Abstract: The invention relates to an optical writing method in a semiconductor material (10), the method comprising laser writing in volume of the semiconductor material. The method comprises, prior to laser writing, irradiating the semiconductor material (10) with at least one laser pre-pulse configured to change transiently and locally one property of the semiconductor material (10).
    Type: Application
    Filed: July 7, 2022
    Publication date: October 17, 2024
    Inventors: David GROJO, Andong WANG, Amlan DAS
  • Methods and systems for optical functionalisation of a sample made of semiconductor material
    Patent number: 10509168
    Abstract: According to one aspect, the invention concerns a system (100) for the in-depth optical functionalization of a sample (10) made of semiconductor material, comprising: a source (20) for emitting a laser beam formed by pulses of effective duration between 1 ps and 100 ns, having a wavelength in the spectral transparency band of the material; a microscope objective (40) for deep focusing in the sample of the laser beam in a predetermined pattern, the light intensity per pulse in a focal volume of the laser beam being adapted for multiphoton absorption in the semiconductor material; a device (30) for measuring the real part of the refractive index of the sample at each point of the pattern; a control unit (60) for controlling the number of pulses received per pattern point as a function of said measurement of the real part of the refractive index so as to obtain, at each pattern point, a progressive modification of the real part of the refractive index of the material until a relative variation of the real par
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: December 17, 2019
    Assignees: UNIVERSITÉ D'AIX MARSEILLE, Centre National de la Recherche Scientifique
    Inventors: David Grojo, Maxime Chambonneau
  • METHODS AND SYSTEMS FOR OPTICAL FUNCTIONALISATION OF A SAMPLE MADE OF SEMICONDUCTOR MATERIAL
    Publication number: 20190265412
    Abstract: According to one aspect, the invention concerns a system (100) for the in-depth optical functionalization of a sample (10) made of semiconductor material, comprising: a source (20) for emitting a laser beam formed by pulses of effective duration between 1 ps and 100 ns, having a wavelength in the spectral transparency band of the material; a microscope objective (40) for deep focusing in the sample of the laser beam in a predetermined pattern, the light intensity per pulse in a focal volume of the laser beam being adapted for multiphoton absorption in the semiconductor material; a device (30) for measuring the real part of the refractive index of the sample at each point of the pattern; a control unit (60) for controlling the number of pulses received per pattern point as a function of said measurement of the real part of the refractive index so as to obtain, at each pattern point, a progressive modification of the real part of the refractive index of the material until a relative variation of the real par
    Type: Application
    Filed: June 27, 2017
    Publication date: August 29, 2019
    Applicants: UNIVERSITÉ D'AIX MARSEILLE, Centre National de la Recherche Scientifique
    Inventors: David Grojo, Maxime Chambonneau