Ultra-compact on-chip LED collimation optics by 3D femtosecond direct laser writing.
Ultra-compact on-chip LED collimation optics by 3D femtosecond direct laser writing.
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DOI：
10.1364/ol.41.003029
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发表时间：
2016-07
期刊：
影响因子：
3.6
通讯作者：
S. Thiele;T. Gissibl;H. Giessen;A. Herkommer
中科院分区：
文献类型：
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作者：
S. Thiele;T. Gissibl;H. Giessen;A. Herkommer
通过使用双光子光刻3D打印，我们展示了直接在LED芯片上增材制造介电集中器。在直径和长度均小于200 μm的情况下，准直方向上的光输出增加了6.2倍，而发射半角减小了50%。我们测量了接近模拟的出色形状保真度和辐照度图案。此外，提出了一种更复杂的形状设计，其呈现出非传统的三角形照明图案。所介绍的方法具有特殊的设计自由度，可用于定制高质量的微型照明光学器件，用于特定的照明任务，例如内窥镜检查。
By using two-photon lithographic 3D printing, we demonstrate additive manufacturing of a dielectric concentrator directly on a LED chip. With a size of below 200 μm in diameter and length, light output is increased by a factor of 6.2 in collimation direction, while the emission half-angle is reduced by 50%. We measure excellent form fidelity and irradiance patterns close to simulation. Additionally, a more complex shape design is presented, which exhibits a nonconventional triangular illumination pattern. The introduced method features exceptional design freedoms which can be used to tailor high-quality miniature illumination optics for specific lighting tasks, for example, endoscopy.