Surface Light Extraction Mapping from Two-Dimensional Array of 12-Fold Photonic Quasicrystal on Current Injected GaN-Based LEDs

Chin. Phys. Lett.

2007, Vol. 24

Issue (4): 979-982 DOI:

Original Articles

Surface Light Extraction Mapping from Two-Dimensional Array of 12-Fold Photonic Quasicrystal on Current Injected GaN-Based LEDs

DAI Tao;ZHANG Bei;ZHANG Zhen-Sheng;LIU Dan;WANG Xiao;BAO Kui;KANG
Xiang-Ning;XU Jun;YU Da-Peng;ZHU Xing

School of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871

Cite this article:

DAI Tao, ZHANG Bei, ZHANG Zhen-Sheng et al 2007 Chin. Phys. Lett. 24 979-982

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Abstract A two-dimensional array of dodecagonal photonic quasicrystal (12PQC) is fabricated on the surface of current injected GaN-based LEDs to out-couple guided modes. The spatially-resolved surface light extraction mapping of 12PQC is observed and compared with that of triangular lattice photonic crystal (3PC) by microscopic electrical luminescence and scanning near-field microscopy. The higher enhancement factor of 12PQC is obtained to be larger than that of 3PC. It is shown that 12PQC is more favourable and efficient for light extraction of guided lights.

Keywords: 42.70.Qs 07.79.Fc 85.60.Jb

Received: 16 October 2006 Published: 26 March 2007

PACS:	42.70.Qs	(Photonic bandgap materials)
	07.79.Fc	(Near-field scanning optical microscopes)
	85.60.Jb	(Light-emitting devices)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I4/0979

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	DAI Tao
	ZHANG Bei
	ZHANG Zhen-Sheng
	LIU Dan
	WANG Xiao
	BAO Kui
	KANGXiang-Ning
	XU Jun
	YU Da-Peng
	ZHU Xing

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