Research

Joseph S. Choi

Publications

  1. Joseph S. Choi and John C. Howell, "Digital integral cloaking", Optica 3, 536-540 (2016).

    (See University of Rochester press release (May 19, 2016).)

    (Additional movies are available from the Supplementary Material section of our paper.)
  2. Joseph S. Choi, Ph.D. Thesis: "Practical Invisibility Cloaking", The Institute of Optics, University of Rochester, Rochester, NY (April 19, 2016).
  3. Joseph S. Choi and John C. Howell, "Paraxial full-field cloaking", Opt. Express 23, 15857-15862 (2015).
  4. Joseph S. Choi and John C. Howell, "Paraxial ray optics cloaking", Opt. Express 22, 29465-29478 (2014).
    Paraxial Ray Optics Cloaking ('Rochester Cloak')
    'Rochester Cloak' Demonstration. (Photo by J. Adam Fenster / University of Rochester)

    (See University of Rochester press release (Sep. 25, 2014) for simplified DIY instructions.)

    (Additional movies are available from the Supplementary Material section of our paper.)
  5. John C. Howell, J. Benjamin Howell, Joseph S. Choi, “Amplitude-only, passive, broadband, optical spatial cloaking of very large objects”, Applied Optics 53, 1958 (2014).
  6. Hanju Rhee, Joseph S. Choi, David J. Starling, John C. Howell and Minhaeng Cho, “Amplifications in chiroptical spectroscopy, optical enantioselectivity, and weak value measurement”, Chem.Sci. 4, 4107 (2013).
  7. Joseph S. Choi and Minhaeng Cho, “Limitations of a superchiral field”, Phys.Rev.A 86, 063834 (2012).
  8. David J. Starling, Steven M. Bloch, Praveen K. Vudyasetu, Joseph S. Choi, Bethany Little, and John C. Howell, “Double Lorentzian atomic prism”, Phys. Rev. A 86, 023826 (2012).
  9. Brandon Buckley, Joseph Choi, Georg H. Hoffstaetter, “Emittance Dilution due to Transverse Coupler Kicks in the Cornell ERL”, Report Cornell-ERL-06-02 (2006).
  10. Georg H. Hoffstaetter, et al., “Status of a Plan for an ERL Extension to CESR”, Proceedings PAC05, Knoxville/TN (2005).
  11. Joseph S. Choi, “In Situ Ellipsometry of Surfaces in an Ultrahigh Vacuum Thin Film Deposition Chamber”, University Honors Thesis, Brigham Young University (2001).

Presentations

  1. Joseph S. Choi and John C. Howell, "Digital integral cloaking", SPIE Optics and Photonics, San Diego, CA (August, 2016). (Conference proceedings copy)
  2. Joseph S. Choi and John C. Howell, "Rudimentary binary classification for quantum machine learning", Poster, Adiabatic Quantum Computing Conference, Venice, CA (June, 2016).
  3. Joseph S. Choi, Data Science Competition finalist presentation, UP-STAT 2016, Buffalo, NY (April, 2016). (Placed 2nd.)
  4. Joseph S. Choi and John C. Howell, "Digital Integral Cloaking", Poster, Center for Energy & Environment Symposium, University of Rochester, Rochester, NY (April 29, 2016).
  5. Joseph S. Choi, Ph.D. Defense: "Practical Invisibility Cloaking", The Institute of Optics, University of Rochester, Rochester, NY (April 5, 2016).
  6. Joseph S. Choi and John C. Howell, "Paraxial Cloaking- A 'Rochester Cloak:' Is an Ideal, Broadband and Omnidirectional Cloak Possible?", Poster (#9544-109), SPIE Optics and Photonics, San Diego, CA (August, 2015).
  7. Joseph S. Choi and John C. Howell, "Multidirectional Invisibility with Rays of Light- A “Rochester Cloak”", AAPT (American Association of Physics Teachers) Advanced Labs, Beyond the First Year II (BFY 2) Conference, College Park, MD (July, 2015). (See Tutorials section to download presentation for use as a lab course.)
  8. Joseph S. Choi ('camper'), Science Foo Camp, Googleplex, Mountain View, CA (June, 2015).
  9. Joseph S. Choi and John C. Howell, “Paraxial full-field cloaking”, APS DAMOP, Columbus, OH (June, 2015).
  10. Joseph S. Choi and John C. Howell, “Paraxial ray optics cloaking”, SPIE Photonics West, San Francisco, CA (February, 2015). (Conference proceedings copy)

    Edmund Optics Exhibitor Booth Demonstration: On Light Matters (2/18/15), beginning at 4:12.

  11. Joseph S. Choi, “How to cloak with rays of light”, Tech+Forum, Seoul, Korea (Nov. 20, 2014).

    (YTN Science News, Movie-like avatar, invisiblity cloak become reality, (Nov. 21, 2014) (Begins at 0:54)).

  12. The New Jersey Chamber of Commerce, NJ 350th Anniversary Innovation Gala, Demonstration of 'Rochester Cloak' (Oct. 27, 2014). (Photos)
  13. Joseph S. Choi, John C. Howell, Minhaeng Cho, “Limitations of a Superchiral Field”, IGERT Presentation, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana (August, 2013).
  14. Joseph S. Choi, Chanse Hungerford, Stephen Head, Amanda Preske, Tyler DuBeshter, Ryan Severins, Lenore Kubie and Rebecca Berman, Solar Panel Workshop in Ghana, NSF IGERT sponsored trip, Takoradi Technical Institute (TTI), Ghana (August, 2013).

    Solar Panel Workshop at TTI Solar Panel Workshop outdoor testing at TTI Solar Panel Workshop OSA Optics Suitcase demonstration at TTI Solar Panel Workshop group photo at TTI Solar Panel Workshop installation at remote village near TTI Solar Optics demonstration with principal and teachers at Kumasi Technical Institute Solar Optics demonstration with students at Kumasi Technical Institute Chief of Staff and other government officials of the Ashanti King, Kumasi, Ghana
    Also shared optics, nanotechnology, chemistry demonstrations at TTI and at Kumasi Technical Institute (KTI), Ghana.

  15. Joseph S. Choi, Minhaeng Cho, “Limitations of a Superchiral Field”, Poster session, Energy for the 21st Century Symposium, Rochester NY (March, 2013).
  16. Joseph S. Choi, Hyun Il Cheong, Michal Maj, Minhaeng Cho, Todd D. Krauss, Kara L. Bren, “Spectrum of Zn Porphyrin Pair Under Translation and Rotation”, Poster session, Energy for the 21st Century Symposium, Rochester NY (March 2013).
  17. Joseph Choi and John Howell, “Overview of Possible Quantum Mechanics in Photosynthesis”, Poster session, Energy for the 21st Century Symposium, Rochester NY (Oct. 2011).

Patents

  1. Joseph S. Choi and John C. Howell, “3D Display Ray Principles and Methods, Zooming, and Real-time Demonstration”, U.S. Provisional Patent Application No. 62/378,016 (Filed: August 22, 2016; patent pending).

  2. John C. Howell and Joseph S. Choi, “Cloaking Systems and Methods”, PCT Application PCT/US2016/028665 (Filed: April 21, 2016; patent pending; information sheet).

  3. Joseph S. Choi and John C. Howell, “Paraxial Cloak Design and Device”, U.S. Utility Patent Application 14/714,671 (Filed: May 18, 2015; patent pending).

Tutorials

  1. How to use the "Rochester Cloak" for a Science Lab.

    The 2015 AAPT BFY 2 (College Park, MD) presentation (citation information in Presentation section) can be used for a lab course, ranging from beginning level to advanced level, depending on how much students are asked to do and how good of a background image they should obtain. The presentation includes:

    1. Invisibility cloaking background
    2. Tutorial: Geometric optics, ABCD matrix
    3. Problem sets for students: ABCD matrix and paraxial cloaking
    4. Paraxial cloaking theory and experiments
    5. Possible research ideas
    6. Lab suggestions, demonstration guidelines
    7. Specifications for lenses to order and thick lens calculations.

    Presentation Download: Low-resolution version. High resolution version.
  2. Overview to help learn quantum weak value measurement:

    Joseph S. Choi, “Overview of Weak Values and Enhancement of Small Signals in Physics and Chemistry”, Physics 532 final paper, University of Rochester, NY (April, 2013). (Smaller file size here)

© 2015-2017 Joseph S. Choi