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Youngwoo W Yi

from Wilmington, MA
Age ~57
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Also known as:
Young W Yi, Young Woo Yi, Young-Woo Yi, Woo Yi Young, Yi W Young, Yi Youngwoo, Yi Young-Woo
Related to:
Hao WuYonghui Wu, 58Thanh T Phan, 55Pan S Han, 61Ming G Zheming, 50
Connected to:
Aihua Yi, 48Alice M Yi, 38Angela Yi, 39Bonnie Yi, 28Caleb Yi, 31Calvin T Yi, 35Carolyn S Yi, 37Charlotte J Yi, 33Chi Y Yi, 46Chong M Yi, 65

Youngwoo Yi Phones & Addresses

  • Wilmington, MA
  • Corrales, NM
  • Louisville, CO
  • Boulder, CO
  • Golden, CO
  • Norcross, GA
  • Doraville, GA
  • Louisville, CO
  • Golden, CO

Work

Company: University of colorado at boulder Aug 2004 Position: Research associate

Education

School / High School: Colorado School of Mines- Golden, CO May 2004 Specialities: Ph. D. in Applied Physics

Skills

Fabrication and Surface Modification: Se... • Liquid crystal cells • UV and thermal curing of polymer precurs... • Nanoimprinting • Reactive ion etching • E-beam and photo lithography Analytical ... • UV/VIS spectroscopy • Optical second harmonic generation • Polarizing optical microscopy • Measurement of optical retardation • Electro or photo modulation of liquid cr... • Atomic Force Microscopy (AFM) • Scanning Electron Microscopy (SEM) Compu... • Origin • Mathematica • Canvas • LabVIEW • DesignCAD • Web search

Resumes

Resumes

Youngwoo Yi Photo 1

Youngwoo Yi

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Youngwoo Yi Photo 2

Youngwoo Yi Louisville, CO

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Work:
University of Colorado at Boulder

Aug 2004 to 2000
Research Associate
Colorado School of MInes
Golden, CO
May 2001 to Apr 2004
Research Assistant
Education:
Colorado School of Mines
Golden, CO
May 2004
Ph. D. in Applied Physics
Georgia State University
Atlanta, GA
Aug 1996
M. S. in Physics
Yonsei University
Seoul, KR
Feb 1991
B. S. in Physics
Skills:
Fabrication and Surface Modification: Self-Assembled Monolayers (SAMs) on glass/silicon substrates, Liquid crystal cells, UV and thermal curing of polymer precursors, Nanoimprinting, Reactive ion etching, E-beam and photo lithography Analytical skills: Ellipsometry, UV/VIS spectroscopy, Optical second harmonic generation, Polarizing optical microscopy, Measurement of optical retardation, Electro or photo modulation of liquid crystal cells, Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM) Computer skills: MS Office, Origin, Mathematica, Canvas, LabVIEW, DesignCAD, Web search

Publications

Us Patents

All-Optically Prepared And Controlled Nematic Liquid Crystal Light Valve

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US Patent:
20060055837, Mar 16, 2006
Filed:
Sep 13, 2005
Appl. No.:
11/225918
Inventors:
Thomas Furtak - Golden CO, US
Youngwoo Yi - Boulder CO, US
International Classification:
G02F 1/135
US Classification:
349027000
Abstract:
The present invention provides a device that acts as an optical switch to control the intensity of a light beam through the action of a second control beam. This behavior is achieved through photoinduced anisotropy that develops in a monomolecular layer coating the inside surfaces of a liquid crystal cell. One of the surfaces is permanently aligned prior to assembly by illuminating the surface with polarized light in the presence of oxygen. The other surface retains reversible behavior, adapting anisotropy according to the orientation of the polarization of the control beam. Accordingly, an optically controlled liquid crystal light valve is provided that does not require contact-rubbing methods in order to permanently align one of the layers coating an inside surface of the cell.

Electro-Optic Polymer Devices Having High Performance Claddings, And Methods Of Preparing The Same

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US Patent:
20200183245, Jun 11, 2020
Filed:
Sep 17, 2019
Appl. No.:
16/573257
Inventors:
Youngwoo Yi - Louisville CO, US
Cory Steven Pecinovsky - Lafayette CO, US
Michael Stephen Lebby - San Francisco CA, US
Richard Anthony Becker - Cupertino CA, US
Assignee:
Lightwave Logic, Inc. - Englewood CO
International Classification:
G02F 1/166
G02B 1/04
G02F 1/361
G02F 1/365
Abstract:
Electro-optic (EO) devices having an EO polymer core comprising a first host polymer and a first nonlinear optical chromophore (NLOC); and a cladding comprising a second host polymer and a second NLOC, and methods of preparing the same; wherein the first NLOC has a first bridge covalently bonded to an electron-accepting group and an electron-donating group; wherein the second NLOC has a second bridge covalently bonded to an electron-accepting group and an electron-donating group; and wherein the second bridge is less conjugated than the first bridge such that the cladding has an index of refraction that is less than that of the EO polymer core, and wherein the second NLOC is present in the second host polymer in a concentration such that the cladding has a conductivity equal to or greater than at least 10% of the conductivity of the EO polymer core at a poling temperature.

Protection Layers For Polymer Modulators/Waveguides

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US Patent:
20200088941, Mar 19, 2020
Filed:
Nov 21, 2019
Appl. No.:
16/690491
Inventors:
- Longmont CO, US
Michael Lebby - San Francisco CA, US
Youngwoo Yi - Louisville CO, US
Assignee:
Lightwave Logic Inc. - Longmont CO
International Classification:
G02B 6/122
G02B 6/12
G02F 1/00
G02B 6/132
Abstract:
A polymer waveguide/modulator including a lower cladding layer, a polymer core, an upper cladding layer, a first protection/barrier layer sandwiched between the lower cladding layer and the core, and a second protection/barrier layer sandwiched between the core and the upper cladding layer. The protection/barrier layers designed to protect the cladding layers and the core from solvents and gases and to prevent current leakage between the cladding layers and the core. The first protection/barrier layer is optically transparent and designed with a refractive index less than, greater than, or the same as the refractive index of the core and approximately equal to the refractive index of the lower cladding layer. The second protection/barrier layer is optically transparent and designed with a refractive index less than, greater than, or the same as the refractive index of the core and approximately equal to the refractive index of the upper cladding layer.

Fabrication Process Of Polymer Based Photonic Apparatus And The Appartus

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US Patent:
20190353843, Nov 21, 2019
Filed:
May 14, 2019
Appl. No.:
16/411583
Inventors:
- Longmont CO, US
Michael Lebby - San Francisco CA, US
Brian Shaw - Fort Collins CO, US
Richard Becker - Cupertino CA, US
Youngwoo Yi - Louisville CO, US
Assignee:
Lightwave Logic Inc. - Longmont CO
International Classification:
G02B 6/122
G02B 6/136
G02F 1/065
Abstract:
A method of fabricating polymer modulators includes forming an insulating layer on a platform and depositing and patterning a ground electrode on the insulating layer. A bottom polymer cladding layer, a first blocking layer, a polymer core layer, a second blocking layer, and a top polymer cladding layer are deposited in order. A third blocking layer is deposited on the top cladding layer and patterned to define vias which are used to etch ground openings through the top polymer cladding layer, the second blocking layer, the core layer, the first blocking layer, and the bottom cladding layer to the ground electrode. The openings are filled with electrically conductive material from electrical communication with the ground electrode to a surface of the top polymer cladding layer. The third blocking layer is removed and electrical contacts are formed on the top polymer cladding layer in electrical communication with the electrically conductive material.

Protection Layers For Polymer Modulators/Waveguides

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US Patent:
20190204506, Jul 4, 2019
Filed:
Dec 28, 2017
Appl. No.:
15/857336
Inventors:
- Longmont CO, US
Michael Lebby - San Francisco CA, US
Youngwoo Yi - Louisville CO, US
Assignee:
Lightwave Logic Inc. - Longmont CO
International Classification:
G02B 6/122
G02B 6/132
Abstract:
A polymer waveguide/modulator including a lower cladding layer, a polymer core, an upper cladding layer, a first protection/barrier layer sandwiched between the lower cladding layer and the core, and a second protection/barrier layer sandwiched between the core and the upper cladding layer. The protection/barrier layers designed to protect the cladding layers and the core from solvents and gases and to prevent current leakage between the cladding layers and the core. The first protection/barrier layer is optically transparent and designed with a refractive index less than, greater than, or the same as the refractive index of the core and approximately equal to the refractive index of the lower cladding layer. The second protection/barrier layer is optically transparent and designed with a refractive index less than, greater than, or the same as the refractive index of the core and approximately equal to the refractive index of the upper cladding layer.
Control profile
Youngwoo W Yi from Wilmington, MA, age ~57 Get Report