| 光谱学与光谱分析 |
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| Research on Enhancement of the Extraction Efficiency of C-Band LED with 2D Photonic Crystals |
| WEI Ke-jia1, LI Hong-qiang1*, CHEN Hong-da2, LI En-bang1, 3, LIU Zhi-hui1 |
1. School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China
2. Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
3. Centre for Ultrahigh Bandwidth Devices for Optical Systems, The University of Sydney, New South Wales 2006, Australia |
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Abstract On-chip light source is the main development part of the optoelectronic systems in the future. As on-chip light source, the main disadvantage of LED is its low extraction efficiency. Photonic crystal is an efficient method to increase the extraction efficiency of LED. The structure and parameters of the C-band LED was designed and the band gap of the 2D photonic crystals for different arrangement and different ratio was calculated using the finite-difference time-domain (FDTD) method, and then the best structural parameters of the 2D photonic crystals were determined using the method of band gap theory in this paper. Results show that the best structure is air holes PC with a triangular arrangement having a lattice constant of 500 nm and a ratio of 0.44.
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Received: 2012-03-31
Accepted: 2012-07-20
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Corresponding Authors:
LI Hong-qiang
E-mail: lihongqiang@tjpu.edu.cn
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