光子晶体InGaN/GaN led偏振特性的理论分析

2009 9th International Conference on Numerical Simulation of Optoelectronic Devices Pub Date : 2009-10-30 DOI:10.1109/NUSOD.2009.5297244

M. Jung, J. Yu, Y. M. Song, Y. T. Lee

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引用次数: 0

摘要

利用三维时域有限差分方法，从理论上研究了光子晶体(PCs) gan基绿色(525 nm)发光二极管(led)的偏振特性。光提取效率在很大程度上取决于光子带隙(PBG)相对于频率(a/λ)的位置和横向电(TE)和横向磁(TM)极化的空穴深度。当a/λ频率在PBG区域内匹配时，提取效率最高，比无光子晶体的传统LED在TE (TM)极化下的提取效率提高29%(22%)。结果表明，PC结构中的a/λ可以控制光的偏振。

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Theoretical analysis of polarization characteristics of InGaN/GaN LEDs with photonic crystals

We investigated theoretically the polarization characteristics of GaN-based green (525 nm) light-emitting diodes (LEDs) with photonic crystals (PCs) using a three-dimensional finite difference time domain method. The light extraction efficiency depends strongly on the photonic bandgap (PBG) position relative to a frequency (a/λ) and the depth of air hole for transverse electric (TE) and transverse magnetic (TM) polarizations. The maximum extraction efficiency was achieved when the frequency of a/λ was matched within PBG region, leading to about 29% (22%) higher than the conventional LED without photonic crystals for TE (TM) polarization. It is found that the polarization of light can be controlled by the a/λ in PC structure.

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2009 9th International Conference on Numerical Simulation of Optoelectronic Devices

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