A Short Review of All-Dielectric Topological Photonic Crystals

Wang, Hai-Xiao; Jiang, Jian‐Hua

doi:10.3389/fphy.2022.866552

Cited by 14 publications

(2 citation statements)

References 205 publications

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“…Topological photonics is an interdisciplinary field at the interface between photonics and topological physics, which has greatly fertilized both fields in the past decade 1 – 5 . Hallmark topological phenomena such as unidirectional backscattering-immune photonic edge states were discovered with analog to quantum anomalous Hall (QAH) insulators in time-reversal broken photonic systems 6 – 15 .…”

Section: Introductionmentioning

confidence: 99%

Hybrid topological photonic crystals

Wang

et al. 2023

Nat Commun

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Topologically protected photonic edge states offer unprecedented robust propagation of photons that are promising for waveguiding, lasing, and quantum information processing. Here, we report on the discovery of a class of hybrid topological photonic crystals that host simultaneously quantum anomalous Hall and valley Hall phases in different photonic band gaps. The underlying hybrid topology manifests itself in the edge channels as the coexistence of the dual-band chiral edge states and unbalanced valley Hall edge states. We experimentally realize the hybrid topological photonic crystal, unveil its unique topological transitions, and verify its unconventional dual-band gap topological edge states using pump-probe techniques. Furthermore, we demonstrate that the dual-band photonic topological edge channels can serve as frequency-multiplexing devices that function as both beam splitters and combiners. Our study unveils hybrid topological insulators as an exotic topological state of photons as well as a promising route toward future applications in topological photonics.

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Section: Introductionmentioning

confidence: 99%

Hybrid topological photonic crystals

Wang

et al. 2023

Nat Commun

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“…The application chosen to demonstrate the capabilities of the multibeam lithography in this work is the creation of a hexagonal anti-dot array with the critical dimension of 600 nanometers that can be further used to make photonic 1 Photonic crystals are periodic, nanostructured surfaces and three-dimensional structures that are tailored to have forbidden energy regions in their band structures that inhibits propagation of electromagnetic waves with certain wavelengths. Alternatively, they can be designed to improve the transmission of certain wavelengths while inhibiting others.…”

Section: Introductionmentioning

confidence: 99%

High-resolution large-area patterning of photonic structures using a multibeam direct write laser lithography technology

Keskinbora,

Kremers,

Aarts

et al. 2023

Laser Beam Shaping XXIII

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In this work, we report on the results obtained using a multibeam direct-write laser lithography technology for the fabrication of sub-micron photonic structures. This approach uses a state-of-the-art tool that simultaneously offers highthroughput and high-resolution fabrication capabilities for scalable nanotechnology applications. We demonstrate the capabilities of the multibeam laser lithography by optimizing and fabricating an anti-dot array. We show that our technology is capable of producing structures with feature sizes as small as 300 nm with high fidelity and uniformity. Moreover, we investigate the influence of various parameters, such as laser power, and focus settings on the resolution and quality of the fabricated structures. The potential of the multibeam laser lithography is further demonstrated for the exposure of large surface areas by fabricating a 12 cm x 12 cm photonic crystal array with critical dimensions of 600 nm. The uniformity and periodicity over the entire area are both investigated by extensive metrology, demonstrating high scalability. Overall, our results highlight the potential of multibeam laser lithography as a powerful method for industrial scale nanotechnology. The technique offers great versatility, making it an ideal tool for various applications in various fields of optics, from wafer-level integrated photonics to photonic bandgap structures, and from displays to large area Xray optics.

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Topological light guiding and trapping via shifted photonic crystal interfaces

Zhan,

Guo,

et al. 2023

Applied Physics Letters

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The exploration of topological states in photonic crystals has inspired a number of intriguing discoveries, which in turn provide new mechanisms for the manipulation of light in unprecedented ways. Here, we show that light can be effectively guided and trapped at the shifted photonic crystal interfaces (SPCIs). The projected bandgap of SPCIs, which depends on the shift parameter, is characterized by a Dirac mass. Interestingly, the SPCI with zero Dirac mass is a glide-symmetric waveguide featured with gapless interface states that exhibit excellent transmission performance even in the presence of disorders and sharp corners. Moreover, placing two SPCIs with opposite Dirac mass together results in a photonic bound state due to the Jackiw–Rebbi theory. Our work provides an alternative way toward the design of ultracompact photonic devices such as robust waveguides and cavities as well as the cavity-waveguide coupled systems that can serve as high-performance building blocks of miniature integrated topological photonic circuits.

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A Short Review of All-Dielectric Topological Photonic Crystals

Cited by 14 publications

References 205 publications

Hybrid topological photonic crystals

Hybrid topological photonic crystals

High-resolution large-area patterning of photonic structures using a multibeam direct write laser lithography technology

Topological light guiding and trapping via shifted photonic crystal interfaces

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