Multifunctional interface between integrated photonics and free space
Multifunctional interface between integrated photonics and free space
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DOI：
10.1117/1.apn.2.3.036012
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发表时间：
2022-08
期刊：
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通讯作者：
Quentin A. A. Tanguy-Quentin-A.-A.-Tanguy-15704552;Arnab Manna;Saswata Mukherjee;David Sharp;E. Bayati;Yueyang Chen;Karl F. Boehringer;A. Majumdar
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作者：
Quentin A. A. Tanguy-Quentin-A.-A.-Tanguy-15704552;Arnab Manna;Saswata Mukherjee;David Sharp;E. Bayati;Yueyang Chen;Karl F. Boehringer;A. Majumdar
抽象。光子集成电路和自由空间超光学的组合能够解开需要先进的光操纵的技术结，因为它们具有通过长距离波导光实现强光-物质相互作用的联合能力，并通过大空间带宽产品对其进行整形。这种复合系统的快速原型设计需要组件的可互换性。这代表了在高性能光学系统的制造和对准方面的功能挑战。在这里，我们报告了一个灵活的和可互换的接口之间的光子集成电路和自由空间使用低损耗的超光学阵列，并演示了多功能光束整形在780 nm的波长。我们表明，所设计的光学功能的鲁棒性和高保真度的操作，可以实现没有事先精确表征的自由空间输入，也没有严格的光子集成芯片和超光学芯片之间的对齐。对于数值孔径为0.15的双曲面超透镜，尽管输入高斯椭圆变形高达35%，元件失调高达20 μm，仍获得了衍射极限为1.3 μm的光斑。还报道了峰值信噪比>10 dB的全息图像。
Abstract. The combination of photonic integrated circuits and free-space metaoptics has the ability to untie technological knots that require advanced light manipulation due to their conjoined ability to achieve strong light–matter interaction via wave-guiding light over a long distance and shape them via large space-bandwidth product. Rapid prototyping of such a compound system requires component interchangeability. This represents a functional challenge in terms of fabrication and alignment of high-performance optical systems. Here, we report a flexible and interchangeable interface between a photonic integrated circuit and the free space using an array of low-loss metaoptics and demonstrate multifunctional beam shaping at a wavelength of 780 nm. We show that robust and high-fidelity operation of the designed optical functions can be achieved without prior precise characterization of the free-space input nor stringent alignment between the photonic integrated chip and the metaoptics chip. A diffraction limited spot of ∼3 μm for a hyperboloid metalens of numerical aperture 0.15 is achieved despite an input Gaussian elliptical deformation of up to 35% and misalignments of the components of up to 20 μm. A holographic image with a peak signal-to-noise ratio of >10 dB is also reported.