On-chip topological nanophotonic devices

Lu, Cuicui; Yuan, Hongyi; Zhang, Hongyu; Zhao, Wen; Zhang, Nianen; Zheng, Yanji; Elshahat, Sayed; Liu, Yong-Chun

doi:10.1016/j.chip.2022.100025

Cited by 27 publications

(7 citation statements)

References 144 publications

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“…The photonic design of SRR topological structures not only enriches the research scope of the current photonic topological field, [476] but also extends the results to other classical systems. [477] Tremendous challenges still exist that must be addressed. First, to apply SRRs to high-frequency topological photonics construction, a high-precision micro/nanoprocessing technology is required.…”

Section: Discussionmentioning

confidence: 99%

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1D Photonic Topological Insulators Composed of Split Ring Resonators: A Mini Review

Guo,

Wang,

et al. 2023

Advanced Physics Research

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In recent years, topological photonics inspired by electric topological insulators has promoted extensive research on robust electromagnetic (EM) wave manipulation and new wave‐functional devices. Optical resonators can significantly confine EM waves and are the basic building blocks for constructing diverse topological structures under a tight binding mechanism. As an artificial “magnetic atom,” the split‐ring‐resonator (SRR) is one of the most attractive optical resonators. SRRs provide an excellent and flexible platform for constructing various topological structures with complex coupling distributions, uncovering abundant topological properties, and innovating practical devices. Here, the realization and fundamental EM responses of the SRR are briefly introduced. Compared to conventional EM resonance elements, the coupling between SRRs depends not only on the coupling distance but also on the orientation angle of the slits. The recent achievements in various low‐dimensional photonic topological structures composed of SRRs are summarized. Furthermore, this review explains the underlying physical principles and discusses progress in topological devices with SRRs, including wireless power transfer, sensing, and switching. Finally, this review provides an overview of the future of SRR topological structures and their impact on the development of novel topological systems and devices.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

1D Photonic Topological Insulators Composed of Split Ring Resonators: A Mini Review

Guo,

Wang,

et al. 2023

Advanced Physics Research

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“…Especially, the artificial photonic lattice materials have rapidly become a versatile platform to investigate wave transport, including Bloch oscillation, superdiffusion, Anderson localization, and diffusion. − Besides, it is feasible to demonstrate some abnormal wave behaviors, such as disorder-enhanced wave transport in quasiperiodic materials and coexistence of dynamical delocalization and spectral localization in coupled optical fiber loops . The precise controllability of the integrated waveguide system enables it possible to explore the open questions, including the relation of correlated disorder and wave behaviors.…”

Section: Introductionmentioning

confidence: 99%

Probing Structural Correlated Disorder with Photonic Transport

Yang,

Chang,

et al. 2024

ACS Photonics

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Wave spreading has been widely studied in various disordered materials including quasiperiodic, amorphous, and completely random materials based on the spatial order. However, there is no clear observable mechanism connecting the underlying correlated disorder to wave transport. Here, we experimentally probe correlated disorder with different characteristic length scales in disordered materials by directly observing the photonic transport on a chip. The density of states of corresponding aperiodic structures shows different degrees of singularity, suggesting diverse behaviors of photons. By analyzing localization and transport properties of photons, we demonstrate that compared to the nearly ballistic transport in the quasiperiodic lattice with long-range order, photon behavior is partly destroyed from ballistic transport in amorphous lattices with short-range order while totally deviating from ballistic spreading in completely random lattices without spatial order. The spreading coefficient related to the photon variance represents an evident difference for correlated disorder with different characteristic length scales. The resolution of diverse transport behaviors is sufficient to distinguish different disorder types, suggesting an eligible identifier for disorder materials.

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“…Devices optimized with algorithms usually have both compact footprints and good performances. There are various nanophotonic devices that have been designed by different algorithms, including wavelength routers [ 16 , 17 , 18 ], polarization routers [ 19 , 20 ], power splitters [ 21 , 22 , 23 ], metasurfaces [ 24 , 25 , 26 ], and other devices [ 27 , 28 , 29 , 30 ]. The applied algorithms can be divided into different categories, including heuristic algorithms such as genetic algorithms [ 16 , 20 ], gradient-based algorithms such as topology optimization [ 31 ], and artificial intelligence such as neural networks [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Channel Frequency Router Based on an Optimization Algorithm and Dispersion Engineering

Yuan

Zhang

et al. 2023

Nanomaterials

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Integrated frequency routers, which can guide light with different frequencies to different output ports, are an important kind of nanophotonic device. However, frequency routers with both a compact size and multiple channels are difficult to realize, which limits the application of these frequency routers in nanophotonics. Here, a kind of bandgap optimization algorithm, which consists of the finite element method and topology optimization, is proposed to design a multi-channel frequency router. Channels supporting photonic edge states with different frequencies are built through the synthetic dimension of translational deformation. Due to the help of the developed optimization algorithms, the number of channels and output ports can be increased up to nine while maintaining ultracompact device size. The device operates within a working band of 0.585–0.665 c/a, corresponding to 1.504–1.709 μm when the lattice constant is set as 1 μm, covering the telecom wavelength of 1.55 μm. The average crosstalk is about −11.49 dB. The average extinction ratio is around 16.18 dB. Because the bus of the device can be regarded as a part of a topological rainbow, the results show that the structure is robust to fabrication errors. This method is general, which can be used for different materials and different frequency ranges. The all-dielectric planar configuration of our router is compact, robust, and easy to integrate, providing a new method for on-chip multi-channel broadband information processing.

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On-chip topological nanophotonic devices

Cited by 27 publications

References 144 publications

1D Photonic Topological Insulators Composed of Split Ring Resonators: A Mini Review

1D Photonic Topological Insulators Composed of Split Ring Resonators: A Mini Review

Probing Structural Correlated Disorder with Photonic Transport

A Multi-Channel Frequency Router Based on an Optimization Algorithm and Dispersion Engineering

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