当前位置: X-MOL 学术Laser Photonics Rev. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On-Chip Metamaterial Antenna Array with Distributed Bragg Deflector for Generation of Collimated Steerable Beams
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2022-07-03 , DOI: 10.1002/lpor.202200164
Pablo Ginel‐Moreno 1 , Abdelfettah Hadij‐ElHouati 1 , Alejandro Sánchez‐Postigo 1 , J. Gonzalo Wangüemert‐Pérez 1 , Íñigo Molina‐Fernández 1 , Jens H. Schmid 2 , Pavel Cheben 2 , Alejandro Ortega‐Moñux 1
Affiliation  

The generation of collimated steerable beams of light is a fundamental function in optics needed in many applications, including free-space optical communications, remote sensing, and light detection and ranging. Implementing large-aperture light emitters directly on a photonic integrated chip without using external optics and expensive alignment systems is an outstanding challenge in integrated photonics. Here, the experimental demonstration of a new integrated antenna array architecture that uses a compact feeding circuit is reported. The design is based on an apodized Bragg deflector working as a low-loss (<0.3 dB) ultra-compact beam expander, which generates a 40-µm-wide on-chip Gaussian beam that illuminates a one-dimensional array of 112 optical antennas with a length of 1.5 mm. Each antenna comprises a metamaterial subwavelength grating waveguide core that is laterally loaded with an array of periodic radiative silicon segments. The device is fabricated on a 220-nm silicon-on-insulator platform using a single etch process with a minimum feature size of 80 nm. An antenna array with a power gain of 50 dB, a radiation efficiency of −3.8 dB, and a far-field angular divergence of 1.8° × 0.2°, in a wavelength range of 1500–1580 nm is presented.

中文翻译:

具有分布式布拉格偏转器的片上超材料天线阵列,用于产生准直可控光束

准直可控光束的产生是许多应用所需的光学基本功能,包括自由空间光通信、遥感以及光检测和测距。直接在光子集成芯片上实现大孔径光发射器而不使用外部光学器件和昂贵的对准系统是集成光子学中的一项突出挑战。在这里,报告了使用紧凑型馈电电路的新型集成天线阵列架构的实验演示。该设计基于一个变迹布拉格偏转器,用作低损耗 (<0.3 dB) 超紧凑型扩束器,可产生 40 µm 宽的片上高斯光束,照亮 112 个光学天线的一维阵列长度为 1.5 毫米。每个天线包括一个超材料亚波长光栅波导核心,该核心横向加载有周期性辐射硅段阵列。该器件是在 220 nm 绝缘体上硅平台上使用单一蚀刻工艺制造的,最小特征尺寸为 80 nm。提出了一种天线阵列,其功率增益为 50 dB,辐射效率为 -3.8 dB,远场角发散为 1.8° × 0.2°,波长范围为 1500-1580 nm。
更新日期:2022-07-03
down
wechat
bug