期刊
OPTICS LETTERS
卷 45, 期 20, 页码 5668-5671出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.404012
关键词
-
类别
资金
- NRC National Program Office Ideation Program-New Beginning Fund
- Ministerio de Economia y Competitividad FEDER [TEC2016-80718-R]
- Ministerio de Universidades [FPU16/03401, FPU17/00638]
- Junta de Andalucia [P18-RT-1453, P18-RT-793]
- FEDER Andalucia [UMA18-FEDERJA-219]
- Ministerio de Ciencia e Innovacion [PID2019-106747RB-I00]
- Universidad de Malaga
Optical antennas are key components in optical phased arrays for light detection and ranging technology requiring long sensing range and high scanning resolution. To achieve a narrow beam width in the far-field region, antenna lengths of several millimeters or more are required. To date, such long antennas have been impossible to achieve in silicon waveguides because currently demonstrated technologies do not allow accurate control of grating strength. Here, we report on a new type of surface-emitting silicon waveguide with a dramatically increased antenna length of L = 3.65 mm. This is achieved by using a subwavelength metamaterial waveguide core evanescently coupled with radiative segments laterally separated from the core. This results in a far-field diffracted beam width of 0.025 degrees, which is a record small beam divergence for a silicon photonics surface-emitting device. We also demonstrate that by using a design with L-shaped surface-emitting segments, the radiation efficiency of the antenna can be substantially increased compared to a conventional design, with an efficiency of 72% at the wavelength of 1550 nm. (C) 2020 Optical Society of America
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据