'Cloaking' device uses ordinary lenses to hide objects across range of angles

Doctoral student Joseph Choi is pictured with a multidirectional 'perfect paraxial' cloak using 4 lenses.

Doctoral student Joseph Choi is pictured with a multidirectional 'perfect paraxial' cloak using 4 lenses

"There've been many high tech approaches to cloaking and the basic idea behind these is to take light and have it pass around something as if it isn't there, often using high-tech or exotic materials," said John Howell, a professor of physics at the University of Rochester. Forgoing the specialized components, Howell and graduate student Joseph Choi developed a combination of four standard lenses that keeps the object hidden as the viewer moves up to several degrees away from 

"This is the first device that we kow of that can do three-dimentional, continuously multidirectional cloaking, which works for transmitting rays in the visible spectrum," said Choi, a PhD student at Rochester's Institute of Optics.

Here is the link to the official article!


Pioneer IGERT students Lenore Kubie and Rebecca Berman teach the next group of IGERT students ahead of their trip to Ghana.

Ghana class may


  • Lenore Kubie—Using Nanotubes for Synthetic Photosynthesis
  • Lenore Kubie - Applying Nanotechnology to Solar Energy, June 1, 2012 in Kumasi, Ghana
  • Andrew Durney - Poster presentation at the American Chemical Society Northeast Regional Meeting, Rochester, New York, (2012). Durney, Andrew R.; Pennamon, Greg W.; Sadri, Ellen; Mukaibo, Hitomi; Degradable chitosan plug for triggered release of tracers from nano-channels.


  • Kenneth Goodfellow - "Optical antenna enhanced graphene photodetector." Chitraleema Chakraborty, Ryan Beams, Kenneth M. Goodfellow,G. W. Wicks, Lukas Novotny, and A. Nick Vamivakas.  Appl. Phys. Lett. 105, 241114 (2014).  http://scitation.aip.org/content/aip/journal/apl/105/24/10.1063/1.4904800. "Integrated nanophotonics based on nanowire plasmons and atomically thin material." Kenneth M. Goodfellow, Ryan Beams, Chitraleema Chakraborty, Lukas Novotny, and A. N. Vamivakas. Optica. 1, 149 (2014). http://www.opticsinfobase.org/optica/abstract.cfm?uri=optica-1-3-149
  • Joseph Choi -“Limitations of a superchiral field,” Joseph Choi, Minhaeng Cho, Phys. Rev. A 86, 063834 (2012).- “Double Lorentzian atomic prism,” D. Starling, S. Bloch, P. Vudyasetu, J. Choi, B. Little, J. Howell, Phys. Rev. A 86, 023826 (2012).- “Overview of Possible Quantum Mechanics in Photosynthesis,” Joseph Choi, John Howell, Poster session, Energy for the 21st Century Symposium, Rochester NY (Oct. 2011).- “Emittance Dilution due to Transverse Coupler Kicks in the Cornell ERL,” B. Buckley, J. Choi, G.H. Hoffstaetter, Report Cornell-ERL-06-02 (2006).- “Status of a Plan for an ERL Extension to CESR,” G.H. Hoffstaetter, J.S-H. Choi, et al., Proceedings PAC05, Knoxville/TN (2005).- “In Situ Ellipsometry of Surfaces in an Ultrahigh Vacuum Thin Film Deposition Chamber,” Joseph S. Choi, University Honors Thesis, Brigham Young University (2001).



  • IGERT students attended The Advanced Energy Conference in 2010 (NYC) and 2011 (Buffalo), and attended the postponed 2012 conference in NYC in April, 2013. The 2014 conference was held in Albany, and attended by the fourth cohort. Members of our IGERT attended the Department of Energy APRA-E Energy Innovation Summit in 2011 and 2012, and the second cohort of students attended the 2013 summit in late February. In 2014, Principal Investigator Matt Yates and Program Coordinator Vicki Heberling attended ARPA-E with the third cohort, and with Pioneer Rebecca Berman, who, for the second time, was accepted into the Student Program that runs concurrent to the summit. Our fourth cohort just returned from the 2015 summit, and gave an enthusiastic report regarding their experience.

  • Our Pioneer IGERT students presented at the INTERNATIONAL SOLAR ENERGY EXPERTS WORKSHOP (I – SEE 2012) held at The Energy Center, KNUST, Kumasi, Ghana May/June 2012