Metasurface-Dressed Two-Dimensional on-Chip Waveguide for Free-Space Light Field Manipulation

Ding, Yimin; Chen, Xi; Duan, Yao; Huang, Haiyang; Zhang, Lidan; Chang, Shengyuan; Guo, Xuexue; Ni, Xingjie

doi:10.1021/acsphotonics.1c01577

Cited by 47 publications

(41 citation statements)

References 34 publications

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“…The flatness of metalens makes it feasible to manufacture compact and integrated optical systems. , Although the number of publications on beam focusing on the broadband spectrum has rapidly increased during the past decade, its progress toward commercial devices such as a tunable zoom lens in the camera is still lagging behind anticipation. The challenges typically come from the limited dynamic control mechanism and the slow response speed, which hinder its integration into an imaging system to replace the traditional zoom lens array.…”

Section: Applicationsmentioning

confidence: 99%

Recent Advances in Tunable Metasurfaces: Materials, Design, and Applications

et al. 2022

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Metasurfaces, a two-dimensional (2D) form of metamaterials constituted by planar meta-atoms, exhibit exotic abilities to tailor electromagnetic (EM) waves freely. Over the past decade, tremendous efforts have been made to develop various active materials and incorporate them into functional devices for practical applications, pushing the research of tunable metasurfaces to the forefront of nanophotonics. Those active materials include phase change materials (PCMs), semiconductors, transparent conducting oxides (TCOs), ferroelectrics, liquid crystals (LCs), atomically thin material, etc., and enable intriguing performances such as fast switching speed, large modulation depth, ultracompactness, and significant contrast of optical properties under external stimuli. Integration of such materials offers substantial tunability to the conventional passive nanophotonic platforms. Tunable metasurfaces with multifunctionalities triggered by various external stimuli bring in rich degrees of freedom in terms of material choices and device designs to dynamically manipulate and control EM waves on demand. This field has recently flourished with the burgeoning development of physics and design methodologies, particularly those assisted by the emerging machine learning (ML) algorithms. This review outlines recent advances in tunable metasurfaces in terms of the active materials and tuning mechanisms, design methodologies, and practical applications. We conclude this review paper by providing future perspectives in this vibrant and fast-growing research field.

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Section: Applicationsmentioning

confidence: 99%

Recent Advances in Tunable Metasurfaces: Materials, Design, and Applications

et al. 2022

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“…Shaping the free-space emission from a silicon photonic chip to create a focused beam has been achieved with different approaches [ 18 , 73 , 74 , 75 , 76 , 77 ]. Beam focusing allows optical excitation or sensing exclusively of a small volume in the space, which is critical for quantum computation with ion qubits [ 18 ], optical tweezers [ 78 ], optogenetics [ 17 ], FPA-based beam steerers [ 44 ], and microscopy.…”

Section: Beam Shapingmentioning

confidence: 99%

“…In the work by Yulaev et al [ 73 ], the authors added a metalens on top of the 2D beam expander demonstrated in [ 70 ], as shown in Figure 10 d. Working on the SiN platform, they generated a focused spot with a diffraction-limited size of 473 nm at the wavelength of 780 nm. Such a metasurface approach was pushed a step forward by integrating metasurfaces monolithically on silicon waveguides [ 75 ]. An OPA can also be designed to emit a focused beam, as demonstrated by Notaros et al (see Figure 10 e,f) [ 76 ].…”

Section: Beam Shapingmentioning

confidence: 99%

Free-Space Applications of Silicon Photonics: A Review

2022

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Silicon photonics has recently expanded its applications to delivering free-space emissions for detecting or manipulating external objects. The most notable example is the silicon optical phased array, which can steer a free-space beam to achieve a chip-scale solid-state LiDAR. Other examples include free-space optical communication, quantum photonics, imaging systems, and optogenetic probes. In contrast to the conventional optical system consisting of bulk optics, silicon photonics miniaturizes an optical system into a photonic chip with many functional waveguiding components. By leveraging the mature and monolithic CMOS process, silicon photonics enables high-volume production, scalability, reconfigurability, and parallelism. In this paper, we review the recent advances in beam steering technologies based on silicon photonics, including optical phased arrays, focal plane arrays, and dispersive grating diffraction. Various beam-shaping technologies for generating collimated, focused, Bessel, and vortex beams are also discussed. We conclude with an outlook of the promises and challenges for the free-space applications of silicon photonics.

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“…Metasurface-based applications are promising alternatives to replacing existing optical devices, owning to the ultrathin, ultracompact, and multifunctional properties of meta-devices based on the principles of meta-optics [ 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 ]. Meta-optics offer the possibility to address the limitations of conventional optics and a new paradigm to achieve on-chip integrated meta-devices with multi-functional and parallel control of light beams [ 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 ]. Optical metalenses are predicted to have the potential to produce disruptive applications due to the integration of advanced imaging, and the miniaturization and multi-dimensional manipulation of meta-optics [ 126 , 127 , 128 , 129 , 130 ].…”

Section: Introductionmentioning

confidence: 99%

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

Wan

Wang

et al. 2023

Nanomaterials

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Meta-optics based on metasurfaces that interact strongly with light has been an active area of research in recent years. The development of meta-optics has always been driven by human’s pursuits of the ultimate miniaturization of optical elements, on-demand design and control of light beams, and processing hidden modalities of light. Underpinned by meta-optical physics, meta-optical devices have produced potentially disruptive applications in light manipulation and ultra-light optics. Among them, optical metalens are most fundamental and prominent meta-devices, owing to their powerful abilities in advanced imaging and image processing, and their novel functionalities in light manipulation. This review focuses on recent advances in the fundamentals and applications of the field defined by excavating new optical physics and breaking the limitations of light manipulation. In addition, we have deeply explored the metalenses and metalens-based devices with novel functionalities, and their applications in computational imaging and image processing. We also provide an outlook on this active field in the end.

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Metasurface-Dressed Two-Dimensional on-Chip Waveguide for Free-Space Light Field Manipulation

Cited by 47 publications

References 34 publications

Recent Advances in Tunable Metasurfaces: Materials, Design, and Applications

Recent Advances in Tunable Metasurfaces: Materials, Design, and Applications

Free-Space Applications of Silicon Photonics: A Review

Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications

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