Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 2012 | public
Journal Article

Gallium Arsenide Solar Cell Absorption Enhancement Using Whispering Gallery Modes of Dielectric Nanospheres


Based on a perfectly flat gallium arsenide solar cell, we show that it is possible to modify the flow of light and enhance the absorption without modifying the active material structure or degrading its electrical properties. The sunlight couples into confined resonant modes formed by a periodic arrangement of dielectric nanospheres above the solar cell. The in coupling element is lossless and, thus, has the advantage that no energy is lost within the dielectric nanospheres. This stored energy is absorbed by the underlying active material which directly contributes to the photocurrent enhancement of the solar cell.

Additional Information

© 2012 IEEE. Manuscript received July 7, 2011; revised November 23, 2011; accepted December 6, 2011. Date of publication January 13, 2012; date of current version March 16, 2012. The work of J. Grandidier and H. A. Atwater was supported by the Department of Energy "Light-Material Interactions in Energy Conversion" Energy Frontier Research Center under Grant DE-SC0001293. The work of D. M. Callahan and J. N. Munday was supported by the Office of Basic Energy Sciences under Contract DE-FG02-07ER46405. The authors would like to thank I. S. Grudinin from the Jet Propulsion Laboratory for useful discussions.

Additional details

August 19, 2023
October 20, 2023