Numerical Analysis of High-Index Nano-Composite Encapsulant for Light-Emitting Diodes

概要

論文の詳細を見る
We used two-dimensional finte-difference-time-domain (FDTD) software to study the transition behavior of nano-particles from scatterers to an optically uniform medium. We measured the transmission efficiency of the dipole source, which is located in the high refractive index medium ($\text{index}=2.00$) and encapsulated by low index resin ($\text{index}=1.41$). In an effort to compose index-matched resin and to reduce internal reflection, high-index nano-particles are added to low-index resin in simulations of various sizes and densities. As the size of the nano-particles and the average spacing between particles are reduced to $0.02 \lambda $ and $0.07 \lambda $ respectively, the transmission efficiency improves two-fold compared to that without nano-particles. The numerical results can be used to understand the optical behavior of nano-particles and to improve the extraction efficiency of high brightness light-emitting diodes (LEDs), through the use of nano-composite encapsulant.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2006-04-15