We have fabricated microphotonic parabolic light directors using two-photon lithography, thin-film processing, and aperture formation by focused ion beam lithography. Optical transmission measurements through upright parabolic directors 22 μm high and 10 μm in diameter exhibit strong beam directivity with a beam divergence of 5.6°, in reasonable agreement with ray-tracing and full-field electromagnetic simulations. The results indicate the suitability of microphotonic parabolic light directors for producing collimated beams for applications in advanced solar cell and light-emitting diode designs.
Microphotonic parabolic light directors fabricated by two-photon lithography
J. H. Atwater, P. Spinelli, E. Kosten, J. Parsons, C. Van Lare, J. Van de Groep, J. Garcia de Abajo, A. Polman, H. A. Atwater; Microphotonic parabolic light directors fabricated by two-photon lithography. Appl. Phys. Lett. 10 October 2011; 99 (15): 151113. https://doi.org/10.1063/1.3648115
Download citation file: