Multifunctional interface between integrated photonics and free space  

作　　者：Quentin A.A.Tanguy Arnab Manna Saswata Mukherjee David Sharp Elyas Bayati Yueyang Chen Karl F.Böhringer Arka Majumdar 

机构地区：[1]University of Washington,Department of Electrical and Computer Engineering,Seattle,Washington,United States [2]University of Washington,Department of Physics,Seattle,Washington,United States [3]University of Washington,Institute for Nano-engineered Systems,Seattle,Washington,United States

出　　处：《Advanced Photonics Nexus》2023年第3期114-120,共7页先进光子学通讯（英文）

基　　金：supported by Office of Integrative Activities(OIA;Grant No.2134345);Part of this work was conducted at the Washington Nanofabrication Facility/Molecular Analysis Facility,a National Nanotechnology Coordinated Infrastructure(NNCI)site at the University of Washington with partial support from the National Science Foundation via awards(Grant Nos.NNCI-1542101 and NNCI-2025489).

摘　　要：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∼3μm 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 20μm.A holographic image with a peak signal-to-noise ratio of>10 dB is also reported.

关 键 词：integrated photonics metasurface integrated-photonic-to-free-space coupling HOLOGRAMS 

分 类 号：O43[机械工程—光学工程]