<title>AlGaAs/GaAs lens-shaped LED with high efficiency and narrow field pattern</title>

Abstract

ABSTRACFThe new LED structure suitable for high power and narrow beam pattern is proposed composed of microlens and LED layer. The microlens is fabricated by the melthack etching and regrowth technique in LPE. To control the shape of micmlens, mekbk etching and regrowth technique is studied and nearly ideal hemisphere is Obtained. The charterisücs of the proposed LED smxture is calculated based upon ray-tracing method. And the fabricated result is discussed.