Patents by Inventor Xuewu Xu

Xuewu Xu 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: 11822190
    Abstract: Various embodiments may provide a spatial light modulator. The spatial light modulator may include a first electrode arrangement. The spatial light modulator may also include a second electrode arrangement. The spatial light modulator may additionally include a liquid crystal (LC) layer between the first electrode arrangement and the second electrode arrangement. The spatial light modulator may also include one or more nanoantennas in contact with the liquid crystal layer. The first electrode arrangement and the second electrode arrangement may be each configured to allow at least a portion of light to pass through.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: November 21, 2023
    Assignee: Agency for Science, Technology and Research
    Inventors: Xuewu Xu, Ramon Jose Paniagua Dominguez, Arseniy Kuznetsov
  • Publication number: 20220252945
    Abstract: Various embodiments may provide a spatial light modulator. The spatial light modulator may include a first electrode arrangement. The spatial light modulator may also include a second electrode arrangement. The spatial light modulator may additionally include a liquid crystal (LC) layer between the first electrode arrangement and the second electrode arrangement. The spatial light modulator may also include one or more nanoantennas in contact with the liquid crystal layer. The first electrode arrangement and the second electrode arrangement may be each configured to allow at least a portion of light to pass through.
    Type: Application
    Filed: June 24, 2019
    Publication date: August 11, 2022
    Inventors: Xuewu Xu, Ramon Jose Paniagua Dominguez, Arseniy Kuznetsov
  • Publication number: 20140009807
    Abstract: Methods and an apparatus for color holographic display are provided. The method for color holographic display includes modifying a plurality of color component light beams by passing light from each of a plurality of color component light sources through a corresponding one of a plurality of color sub-hologram masks to generate a corresponding plurality of modified color component light beams. The plurality of modified color component light beams are color multiplexed to generate a multiplexed masked color light beam. The multiplexed masked color light beam is shined onto modulated computer generated holographic information corresponding to the object in order to reconstruct the object by diffracting each portion of the multiplexed masked color light beam to a location and at an intensity determined in response to a corresponding portion of the computer generated holographic information to create the object as a color holographic display.
    Type: Application
    Filed: July 5, 2012
    Publication date: January 9, 2014
    Inventors: Yuechao Pan, Xuewu Xu, Sanjeev Solanki, Xinan Liang, Zhiming Abel Lum
  • Patent number: 6906835
    Abstract: The present invention discloses a recording medium comprising an improved doped Stoichiometric Lithium Niobate (SLN) crystal for high-speed holographic data storage. The improved doped SLN has an extremely high optical damage resistance of more than 145 kW/cm2 for power density of an incident laser beam along the c axis. The Recording time using the present improved doped SLN is advantageously very short and is about 1 second for a single hologram with a saturated diffraction efficiency of 28.7% at a recording laser beam density of 70 W/cm2. Reliable retrieval of a signal-image written at as low as 1 milliseconds has been performed in the Z-cut doped SLN. The present recording medium is an improved doped SLN of a Z-cut SLN crystal doped with Iron (Fe) and Terbium (Tb). The Terbium (Tb) content within the fluxed melts for growing the improved doped SLN ranges from 10 ppm to 140 ppm.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: June 14, 2005
    Assignee: Agency for Science, Technology and Research
    Inventors: Xuewu Xu, Sanjeev Solanki, Tow Chong Chong