期刊
LIGHT-SCIENCE & APPLICATIONS
卷 10, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41377-021-00642-2
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资金
- National Natural Science Foundation of China [62075114]
- Beijing Natural Science Foundation [4212050]
- Center of High Performance Computing, Tsinghua University
- RGC Hong Kong [AoE/P-02/12]
Zero-index metamaterials with Dirac-like cone dispersion have isotropic and impedance-matched properties, allowing for efficient interaction with electromagnetic modes and potential applications in waveguides, nonlinear enhancement, and signal generation. This review discusses the fundamental physics, design, experimental realizations, and applications of such metamaterials.
Metamaterials with a Dirac-like cone dispersion at the center of the Brillouin zone behave like an isotropic and impedance-matched zero refractive index material at the Dirac-point frequency. Such metamaterials can be realized in the form of either bulk metamaterials with efficient coupling to free-space light or on-chip metamaterials that are efficiently coupled to integrated photonic circuits. These materials enable the interactions of a spatially uniform electromagnetic mode with matter over a large area in arbitrary shapes. This unique optical property paves the way for many applications, including arbitrarily shaped high-transmission waveguides, nonlinear enhancement, and phase mismatch-free nonlinear signal generation, and collective emission of many emitters. This review summarizes the Dirac-like cone-based zero-index metamaterials' fundamental physics, design, experimental realizations, and potential applications.
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