Patents by Inventor Choon Gi Choi

Choon Gi Choi 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).

  • Publication number: 20140103296
    Abstract: Provided is a graphene nanoribbon sensor. The sensor includes a substrate, a graphene layer formed on the substrate in a first direction, and an upper dielectric layer on the graphene layer. Here, the graphene layer may have a plurality of electrode regions respectively separated in the first direction and a channel between the plurality of electrode regions.
    Type: Application
    Filed: March 12, 2013
    Publication date: April 17, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Young-Jun YU, Choon Gi Choi
  • Publication number: 20130002520
    Abstract: Provided are an active metamaterial device operating at a high speed and a manufacturing method thereof. The active metamaterial device includes a first dielectric layer, a lower electrode disposed on the first dielectric layer, a second dielectric layer disposed on the lower electrode, metamaterial patterns disposed on the second dielectric layer, a couple layer disposed on the metamaterial patterns and the second dielectric layer, a third dielectric layer disposed on the couple layer, and an upper electrode disposed on the third dielectric layer.
    Type: Application
    Filed: March 27, 2012
    Publication date: January 3, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Choon Gi CHOI, Muhan CHOI, Sung-Yool CHOI
  • Publication number: 20130003180
    Abstract: Provided are a filter having a metamaterial structure and a method of manufacturing the filter. The filter includes a first dielectric layer, a first fishnet pattern having one or more first holes partially exposing the first dielectric layer, a second dielectric layer covering the first fishnet pattern and the first dielectric layer, a plurality of reverse patterns having the same shape as those of the first holes, and disposed on the second dielectric layer over the first holes, and a third dielectric layer covering the reverse patterns and the second dielectric layer.
    Type: Application
    Filed: March 27, 2012
    Publication date: January 3, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Choon Gi Choi, Muhan Choi
  • Publication number: 20120326944
    Abstract: Provided are a metamaterial structure and a manufacturing method thereof. The metamaterial structure includes a dielectric layer, nanowires penetrating the dielectric layer and arranged in a spacing having negative refraction with respect to an electromagnetic wave incident on the dielectric layer, and coating layers formed between the nanowires and the dielectric layer.
    Type: Application
    Filed: March 27, 2012
    Publication date: December 27, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Choon Gi CHOI, Muhan Choi
  • Publication number: 20120013989
    Abstract: Provided are a meta material and a method of manufacturing the same. The meta material comprises: a substrate; at least one conductive nano pattern patterned on the substrate and having a size with a negative refractive index in a predetermined electromagnetic wavelength band; and a dielectric layer covering the conductive nano patterns.
    Type: Application
    Filed: January 25, 2011
    Publication date: January 19, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Choon Gi CHOI, Sang Soon Oh
  • Patent number: 7515790
    Abstract: Provided are a two-dimensional planar photonic crystal superprism device and a method of manufacturing the same, in which a manufacturing process is simplified using a nanoimprint lithography technique, and thus price-reduction and mass production are facilitated. The two-dimensional planar photonic crystal superprism device includes: a single-mode input waveguide comprising a straight waveguide having a taper structure and a bending waveguide; a superprism formed on an output end side of the single-mode input waveguide and comprising a slab and a photonic crystal superprism; and a single-mode output waveguide comprising a straight waveguide having a taper structure and a bending waveguide, and formed adjacent to the photonic crystal superprism. Using the two-dimensional planar photonic crystal superprism device, it is possible to facilitate manufacturing of nano-photonic integrated circuits, photonic crystal integrated circuits and nano-photonic systems.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: April 7, 2009
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Choon Gi Choi, Young Tak Han, Jin Tae Kim, Woo Jin Lee
  • Publication number: 20080112669
    Abstract: Provided are a two-dimensional planar photonic crystal superprism device and a method of manufacturing the same, in which a manufacturing process is simplified using a nanoimprint lithography technique, and thus price-reduction and mass production are facilitated. The two-dimensional planar photonic crystal superprism device includes: a single-mode input waveguide comprising a straight waveguide having a taper structure and a bending waveguide; a superprism formed on an output end side of the single-mode input waveguide and comprising a slab and a photonic crystal superprism; and a single-mode output waveguide comprising a straight waveguide having a taper structure and a bending waveguide, and formed adjacent to the photonic crystal superprism. Using the two-dimensional planar photonic crystal superprism device, it is possible to facilitate manufacturing of nano-photonic integrated circuits, photonic crystal integrated circuits and nano-photonic systems.
    Type: Application
    Filed: October 15, 2007
    Publication date: May 15, 2008
    Inventors: Choon Gi Choi, Young Tak Han, Jin Tae Kim, Woo Jin Lee
  • Patent number: 6912332
    Abstract: The present invention relates to a parallel optical interconnection module for transmitting an optical signal over an optical fiber and receiving an optical signal from the optical fiber. According to the present invention, a reflection surface is formed at the end of the optical waveguide forming a core so that the path of light can be exactly changed and is focused. A light source/photodetector is buried within a trench using the silicon optical bench and an optical waveguide is manually aligned on the surface of the silicon optical bench, so that alignment error between the light source/photodetector and the optical waveguide can be minimized. A ferrule into which the optical waveguide is inserted is fixed to an adaptor so that alignment error between the optical waveguide and the light source/photodetector is minimized. Therefore, the present invention can minimize the coupling loss in the process during which the optical signal is transmitted to increase the optical output.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: June 28, 2005
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sang-Pil Han, Choon Gi Choi, Byeong Cheol Kim, Seung Ho Ahn, In Kui Cho, Myung Yung Jeong
  • Publication number: 20040005119
    Abstract: The present invention relates to a parallel optical interconnection module for transmitting an optical signal over an optical fiber and receiving an optical signal from the optical fiber. According to the present invention, a reflection surface is formed at the end of the optical waveguide forming a core so that the path of light can be exactly changed and is focused. A light source/photodetector is buried within a trench using the silicon optical bench and an optical waveguide is manually aligned on the surface of the silicon optical bench, so that alignment error between the light source/photodetector and the optical waveguide can be minimized. A ferrule into which the optical waveguide is inserted is fixed to an adaptor so that alignment error between the optical waveguide and the light source/photodetector is minimized. Therefore, the present invention can minimize the coupling loss in the process during which the optical signal is transmitted to increase the optical output.
    Type: Application
    Filed: October 4, 2002
    Publication date: January 8, 2004
    Inventors: Sang-Pil Han, Choon Gi Choi, Byeong Cheol Kim, Seung Ho Ahn, In Kui Cho, Myung Yung Jeong