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
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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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Articles by authors
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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