All-Dielectric Metasurface with a Two-Dimensional Locally Flat Photonic Band
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908748941885440 |
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| author | Choi, Minho Munley, Christopher Tara, Virat Manna, Arnab Fröch, Johannes Barnard, Arthur Majumdar, Arka |
| author_facet | Choi, Minho Munley, Christopher Tara, Virat Manna, Arnab Fröch, Johannes Barnard, Arthur Majumdar, Arka |
| contents | Photonic flatbands offer promising light-matter interaction due to their unique slow-light nature. In recent years, flatbands have also attracted significant interest in optical engineering because of their angle-insensitive resonant characteristics. However, to date, no studies have reported the dispersionless behavior of flatbands under arbitrary two-dimensional incident angles. Here, we present a two-dimensional photonic flatband created using a silicon metasurface with a Lieb lattice-inspired structure which demonstrates a locally flat photonic band for both transverse electric (TE) and transverse magnetic (TM) polarized light. Employing Fourier imaging, we analyze the energy-momentum dispersion of the flatband metasurface under arbitrary two-dimensional incident angles, demonstrating dispersionless flatbands with a change in resonance within $\pm2 nm$ up to $\pm24ô$ or $\pm5ô$, depending on the polarization state and incident angle. This geometry can be adapted for various applications in local field enhancement, enhanced photodetection, and augmented reality displays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_20871 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | All-Dielectric Metasurface with a Two-Dimensional Locally Flat Photonic Band Choi, Minho Munley, Christopher Tara, Virat Manna, Arnab Fröch, Johannes Barnard, Arthur Majumdar, Arka Optics Mesoscale and Nanoscale Physics Photonic flatbands offer promising light-matter interaction due to their unique slow-light nature. In recent years, flatbands have also attracted significant interest in optical engineering because of their angle-insensitive resonant characteristics. However, to date, no studies have reported the dispersionless behavior of flatbands under arbitrary two-dimensional incident angles. Here, we present a two-dimensional photonic flatband created using a silicon metasurface with a Lieb lattice-inspired structure which demonstrates a locally flat photonic band for both transverse electric (TE) and transverse magnetic (TM) polarized light. Employing Fourier imaging, we analyze the energy-momentum dispersion of the flatband metasurface under arbitrary two-dimensional incident angles, demonstrating dispersionless flatbands with a change in resonance within $\pm2 nm$ up to $\pm24ô$ or $\pm5ô$, depending on the polarization state and incident angle. This geometry can be adapted for various applications in local field enhancement, enhanced photodetection, and augmented reality displays. |
| title | All-Dielectric Metasurface with a Two-Dimensional Locally Flat Photonic Band |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.20871 |