Micro-cylinder mode in photonic quasicrystal observed by near-field optical microscopy

Zheyu Fang; Tao Dai; Bei Zhang; Xing Zhu

doi:10.1117/12.767590

4 January 2008 Micro-cylinder mode in photonic quasicrystal observed by near-field optical microscopy

Zheyu Fang, Tao Dai, Bei Zhang, Xing Zhu

Proceedings Volume 6831, Nanophotonics, Nanostructure, and Nanometrology II; 683102 (2008) https://doi.org/10.1117/12.767590
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

We propose and realize a micro-cylinder mode in photonic quasicrystal (PQC) on the top of an edge-emitting GaN light emitting diodes (LEDs) with 30 μm indium tin oxides (ITO) covered and 8 μm GaN exposed broad-stripe. A well-defined hexagon-like localized state following a C_6v symmetry is identified from the PQC micro-cylinder arrays. Enhancement factor of the surface light extraction from 12-fold PQC patterns on electrical current injected GaN-based light emitters is 2.4 times higher than non-patterned regions, which is observed by scanning near-field optical microscopy (SNOM). According to the near-field optical images, micro-cylinders can be considered as nano-optics sources because the electromagnetic energy is strongly concentrated due to the wave guide modes and the beaming effect of the surface microstructures.

Citation Download Citation

Zheyu Fang, Tao Dai, Bei Zhang, and Xing Zhu "Micro-cylinder mode in photonic quasicrystal observed by near-field optical microscopy", Proc. SPIE 6831, Nanophotonics, Nanostructure, and Nanometrology II, 683102 (4 January 2008); https://doi.org/10.1117/12.767590

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