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American Institute of Physics, Applied Physics Letters, 15(99), p. 151113

DOI: 10.1063/1.3648115

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Microphotonic parabolic light directors fabricated by two-photon lithography

Journal article published in 2011 by J. H. Atwater, P. Spinelli, E. Kosten, J. Parsons, C. Van Lare, J. Van de Groep ORCID, J. Garcia de Abajo, A. Polman, H. A. Atwater
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This paper is available in a repository.

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Abstract

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.