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Observation of topologically enabled unidirectional guided resonances

Author

Listed:
  • Xuefan Yin

    (Peking University
    Massachusetts Institute of Technology)

  • Jicheng Jin

    (University of Pennsylvania)

  • Marin Soljačić

    (Massachusetts Institute of Technology)

  • Chao Peng

    (Peking University
    Massachusetts Institute of Technology)

  • Bo Zhen

    (University of Pennsylvania)

Abstract

Unidirectional radiation is important for various optoelectronic applications, such as lasers, grating couplers and optical antennas. However, almost all existing unidirectional emitters rely on the use of materials or structures that forbid outgoing waves—that is, mirrors, which are often bulky, lossy and difficult to fabricate. Here we theoretically propose and experimentally demonstrate a class of resonances in photonic crystal slabs that radiate only towards one side of the slab, with no mirror placed on the other side. These resonances, which we name ‘unidirectional guided resonances’, are found to be topological in nature: they emerge when a pair of half-integer topological charges1–3 in the polarization field bounce into each other in momentum space. We experimentally demonstrate unidirectional guided resonances in the telecommunication regime by achieving single-side radiative quality factors as high as 1.6 × 105. We further demonstrate their topological nature through far-field polarimetry measurements. Our work represents a characteristic example of applying topological principles4,5 to control optical fields and could lead to energy-efficient grating couplers and antennas for light detection and ranging.

Suggested Citation

  • Xuefan Yin & Jicheng Jin & Marin Soljačić & Chao Peng & Bo Zhen, 2020. "Observation of topologically enabled unidirectional guided resonances," Nature, Nature, vol. 580(7804), pages 467-471, April.
  • Handle: RePEc:nat:nature:v:580:y:2020:i:7804:d:10.1038_s41586-020-2181-4
    DOI: 10.1038/s41586-020-2181-4
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    Cited by:

    1. Hyounghan Kwon & Tianzhe Zheng & Andrei Faraon, 2022. "Nano-electromechanical spatial light modulator enabled by asymmetric resonant dielectric metasurfaces," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Pengcheng Huo & Wei Chen & Zixuan Zhang & Yanzeng Zhang & Mingze Liu & Peicheng Lin & Hui Zhang & Zhaoxian Chen & Henri Lezec & Wenqi Zhu & Amit Agrawal & Chao Peng & Yanqing Lu & Ting Xu, 2024. "Observation of spatiotemporal optical vortices enabled by symmetry-breaking slanted nanograting," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Haoyu Qin & Shaohu Chen & Weixuan Zhang & Huizhen Zhang & Ruhao Pan & Junjie Li & Lei Shi & Jian Zi & Xiangdong Zhang, 2024. "Optical moiré bound states in the continuum," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    4. Dmitrii Gromyko & Shu An & Sergey Gorelik & Jiahui Xu & Li Jun Lim & Henry Yit Loong Lee & Febiana Tjiptoharsono & Zhi-Kuang Tan & Cheng-Wei Qiu & Zhaogang Dong & Lin Wu, 2024. "Unidirectional Chiral Emission via Twisted Bi-layer Metasurfaces," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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