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Proceedings Paper

Emission properties of surface patterned LEDs
Author(s): Dusan Pudis; Pavol Hronec; Jaroslav Kovac; Ivana Lettrichova; Jaroslava Skriniarova; Daniel Jandura; Sofia Slabeyciusova; Lubos Suslik; Jozef Novak; Anton Kuzma
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Paper Abstract

Implementation of planar surface structures allows enhancement of light extraction from the light emitting diode (LED) surface due to diffraction-on-roughness based effect and photonic-band gap effect. Application of such structures can be attractive for overall and local enhancement of light from patterned areas of the LED surface. We used interference and near-field scanning optical microscope lithography for patterning of the surface of GaAs/AlGaAs based LEDs emitted at 840 nm. Also new approach with patterned polydimethylsiloxane (PDMS) membrane applied directly in the LED surface was investigated. Technology of patterned PDMS membranes using interference lithography and imprinting process was developed. The overall emission properties of prepared LED with patterned structure show enhanced light extraction efficiency, what was documented from near- and far-field measurements.

Paper Details

Date Published: 26 September 2013
PDF: 6 pages
Proc. SPIE 8816, Nanoengineering: Fabrication, Properties, Optics, and Devices X, 88161A (26 September 2013); doi: 10.1117/12.2023710
Show Author Affiliations
Dusan Pudis, Univ. of Žilina (Slovakia)
Pavol Hronec, Slovenska Technicka Univ. (Slovakia)
Jaroslav Kovac, Slovenska Technicka Univ. (Slovakia)
Ivana Lettrichova, Univ. of Žilina (Slovakia)
Jaroslava Skriniarova, Slovenska Technicka Univ. (Slovakia)
Daniel Jandura, Univ. of Žilina (Slovakia)
Sofia Slabeyciusova, Univ. of Žilina (Slovakia)
Lubos Suslik, Univ. of Žilina (Slovakia)
Jozef Novak, Institute of Electrical Engineering (Slovakia)
Anton Kuzma, Slovenska Technicka Univ. (Slovakia)

Published in SPIE Proceedings Vol. 8816:
Nanoengineering: Fabrication, Properties, Optics, and Devices X
Eva M. Campo; Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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