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Directional Control of Light-Emitting-Diode Emission Via a Subwavelength-Apertured Metal Surface

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2 Author(s)
Michael D. Harries ; Sch. of Phys. & Astron., Cardiff Univ. ; Huw D. Summers

A thin Au film with a hexagonal array of subwavelength apertures has been integrated onto a semiconductor light-emitting diode. This produces a highly directional far-field pattern with a strong polarization dependence and alters the spectral shape of the light emission from the semiconductor. A two-dimensional k-space analysis of the experimental data shows good agreement with a simple model of surface plasmon to photon coupling via the periodic structure of the metal film

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 21 )