Deterministic integration and optical characterization of telecom O-band quantum dots embedded into wet-chemically etched Gaussian-shaped microlenses
Deterministic integration and optical characterization of telecom O-band quantum dots embedded into wet-chemically etched Gaussian-shaped microlenses
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DOI：
10.1063/1.5038271
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发表时间：
2018-07-16
影响因子：
4
通讯作者：
Portalupi, Simone Luca
中科院分区：
文献类型：
--
作者：
Sartison, Marc;Engel, Lena;Portalupi, Simone Luca
在本研究中，我们报告了在电信o波段发射的量子点的确定性集成到湿化学制造的高斯形微透镜中，其表面质量可与外延晶圆相媲美。缓慢的湿化学蚀刻速率使我们能够控制透镜的长宽比和相对于量子点的垂直位置，使我们能够设计远场形状，以更好地匹配单模光纤的接受轮廓。当采集数值孔径为0.6 ~ 0.2时，最大光增强值约为10 ~ 16。目前的结果是将近红外波段的最先进性能转移到远程光纤通信的关键波长上的重要一步。AIP出版社出版。
In the present study, we report on the deterministic integration of quantum dots, emitting in the telecom O-band, into wet-chemically fabricated Gaussian-shaped microlenses which exhibit a surface quality comparable to epi-ready wafers. The slow wet-chemical etching rate enables us to gain control of the lens aspect-ratio and the vertical position with respect to the quantum dot, allowing us to engineer the far field shape to better match the acceptance profile of single-mode fibers. Maximum light enhancement values of around 10 to 16 could be achieved for collection numerical apertures from 0.6 to 0.2, respectively. The current results constitute an important step forward in transferring state-of-the-art performances achieved in the near-infrared regime to the key wavelengths for long distance fiber communication. Published by AIP Publishing.