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Proceedings Paper

PDMS-based photonic and quasi-photonic crystal for LED application
Author(s): Lubos Suslik; Dusan Pudis; Matej Goraus; Jana Durisova; Martin Hyll; Jaroslav Kovac
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Paper Abstract

The photonic crystals (PhCs) and photonic quasi-crystals (PQCs) have the considerable effect on enhancement of extraction efficiency and radiation pattern of light emitting diodes (LEDs). We present thin polymer membranes based on polydimethylsiloxane (PDMS) with PhC and PQC patterned surface for direct application on the LED chip. The patterned PDMS surface was achieved by embossing of liquid PDMS (Sylgard 184) on structured photoresist surface prepared by interference lithography. The patterned PhC and PQC modify the Lambertian radiation diagram of conventional LEDs. Radiation properties of LEDs were documented from far-field emission by goniophotometer measurements. Structure quality and symmetry was examined by atomic force microscope and related to the measured diffraction pattern of the PhC and PQC LEDs. The emitting LEDs were also investigated in the near field using the near-field scanning optical microscope. Presented results favor patterned PDMS membranes for the employment in LED emission improvement and with considerable effect on light diffraction.

Paper Details

Date Published: 23 December 2016
PDF: 5 pages
Proc. SPIE 10142, 20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 1014221 (23 December 2016); doi: 10.1117/12.2264449
Show Author Affiliations
Lubos Suslik, Univ. of Žilina (Slovakia)
Dusan Pudis, Univ. of Žilina (Slovakia)
Matej Goraus, Univ. of Žilina (Slovakia)
Jana Durisova, Univ. of Žilina (Slovakia)
Martin Hyll, Univ. of Žilina (Slovakia)
Jaroslav Kovac, Slovenska Technicka Univ. (Slovakia)

Published in SPIE Proceedings Vol. 10142:
20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Jarmila Müllerová; Dagmar Senderáková; Libor Ladányi; Ľubomír Scholtz, Editor(s)

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