Photonic quasi-crystal light emitting diodes: comparisons of device performance with pattern pitch

Martin Tillin; Martin D. B. Charlton; Zheng Gong; Ali Z. Khokhar; David Massoubre; Ian M. Watson; Erdan Gu; Martin D. Dawson; Faiz Rahman; Nigel P. Johnson; Douglas Macintyre; Richard M. De La Rue; Keith Parsons; Sean Lin

doi:10.1117/12.853796

12 May 2010 Photonic quasi-crystal light emitting diodes: comparisons of device performance with pattern pitch

Martin Tillin, Martin D. B. Charlton, Zheng Gong, Ali Z. Khokhar, David Massoubre, Ian M. Watson, Erdan Gu, Martin D. Dawson, Faiz Rahman, Nigel P. Johnson, Douglas Macintyre, Richard M. De La Rue, Keith Parsons, Sean Lin

Author Affiliations +

Proceedings Volume 7713, Photonic Crystal Materials and Devices IX; 77130B (2010) https://doi.org/10.1117/12.853796
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

In this paper we discuss theoretical modelling methods for the design of photonic crystal and photonic quasi-crystal (PQC) LEDs - and apply them to the analysis of the extraction enhancement performance and shaping of the emitted beam profile of PQC-LED structures. In particular we investigate the effect of the pitch of the PQC patterning, and consider the physical mechanisms giving rise to performance improvements. In addition, we examine the relative contributions to performance improvements from effective index reduction effects that alter the conditions for total internal reflection at the device air interface, and from photonic crystal scattering effects that give rise to radically improved extraction performance. Comparisons are made with the performance of recently fabricated devices.

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Martin Tillin, Martin D. B. Charlton, Zheng Gong, Ali Z. Khokhar, David Massoubre, Ian M. Watson, Erdan Gu, Martin D. Dawson, Faiz Rahman, Nigel P. Johnson, Douglas Macintyre, Richard M. De La Rue, Keith Parsons, and Sean Lin "Photonic quasi-crystal light emitting diodes: comparisons of device performance with pattern pitch", Proc. SPIE 7713, Photonic Crystal Materials and Devices IX, 77130B (12 May 2010); https://doi.org/10.1117/12.853796

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