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Proceedings Paper

Nano-structured metallic electrodes for plasmonic optimized light-emitting diodes
Author(s): U. Geyer; J. Hetterich; C. Diez; D. Z. Hu; D. M. Schaadt; U. Lemmer
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Paper Abstract

Metallic nanostructures have attracted large interest recently due to new optical properties caused by plasmonic effects. The exceptionally high transmission of light through periodically structured metals is originated by interactions between light and plasmonic resonances. These resonances are controllable by varying periodicity and geometrical dimensions of the metal gratings. Our aim is the utilization of these effects to improve the efficiency of conventional light-emitting diodes (LED). The application of one-dimensional periodic metallic gratings as top electrodes of LEDs offers advantages such as efficient and homogeneous current injection, enhanced light output, modified angular light emission characteristics and linear polarization of the emission. Based on finite-difference time-domain simulations, we optimized the parameters for gold and silver gratings on top of InGaAs/GaAs/AlAs heterostructures. Fabrication of these structures was carried out using laser interference lithography (LIL) and a lift-off process. We measured the optical transmission of these structures and were able to demonstrate a polarization- and wavelength-dependence in good consistency with our calculations.

Paper Details

Date Published: 26 August 2008
PDF: 10 pages
Proc. SPIE 7032, Plasmonics: Metallic Nanostructures and Their Optical Properties VI, 70320B (26 August 2008); doi: 10.1117/12.794563
Show Author Affiliations
U. Geyer, Univ. Karlsruhe (Germany)
J. Hetterich, Univ. Karlsruhe (Germany)
C. Diez, Univ. Karlsruhe (Germany)
D. Z. Hu, Univ. Karlsruhe (Germany)
D. M. Schaadt, Univ. Karlsruhe (Germany)
U. Lemmer, Univ. Karlsruhe (Germany)

Published in SPIE Proceedings Vol. 7032:
Plasmonics: Metallic Nanostructures and Their Optical Properties VI
Mark I. Stockman, Editor(s)

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