用双层增透膜提高半导体单光子发射器的收集效率

Improving the Collecting Efficiency of Light by a Semiconductor Single-Photon Emitter Using Double Antireflection Film

单光发射器发出的光非常微弱,要求收集光学系统能充分收集所发射的光.通常的透镜收集效率非常低(大约在2%左右).从薄膜光学原理出发,构造了液体-玻璃-空气三层结构.数值结果显示,优化设计的三层结构可以获得的最大收集效率为5.75%,是直接用空气收集的最大效率的2.79倍.收集效率不仅与盖玻璃的折射率有关,而且与空气层和玻璃层的厚度有关.

Intensity of light from the single-photon emitter is generally weak, so light from the emitter should be collected as fully as possible. A liquid-glass-air structure is designed and analyzed by using the film optics. The results show that the three-layer structure of oil-glass-air with an optimal design can achieve the maximum collection efficiency of 5.75%, which is 2.79 times as much as that with the use of air directly. The collection efficiency is dependent not only on the refractive index of the glass but also on the thickness of the glass and air film.