Broadband Low-loss Unidirectional Reflection On-chip with Asymmetric Dielectric Metasurface
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910994934005760 |
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| author | Jeong, Heijun Hayran, Zeki Liu, Yuan Xiao, Yahui Lee, Hwaseob Wang, Zi Klamkin, Jonathan Monticone, Francesco Gu, Tingyi |
| author_facet | Jeong, Heijun Hayran, Zeki Liu, Yuan Xiao, Yahui Lee, Hwaseob Wang, Zi Klamkin, Jonathan Monticone, Francesco Gu, Tingyi |
| contents | Metasurface has emerged as a powerful platform for controlling light at subwavelength thickness, enabling new functionalities for imaging, polarization manipulation, and angular momentum conversion within a flat surface. We explored an integrated asymmetric metasurface simultaneously achieving broadband, low loss forward power transmission, and significant back reflection sup-pression in multi-mode waveguides. The tapering along the direction of light propagation leads to low loss and space-efficient mode conversion. Enhanced by a double-flipped structure, a thin (2.5 micrometer) metasurface can simultaneously achieve high conversion efficiency (>80 percent), and back-reflection efficiency of 90 percent over a 200 nm wavelength range. Such single sided reflectors can be one of the enabling components for gain-integrated adaptive optics on a chip. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_06872 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Broadband Low-loss Unidirectional Reflection On-chip with Asymmetric Dielectric Metasurface Jeong, Heijun Hayran, Zeki Liu, Yuan Xiao, Yahui Lee, Hwaseob Wang, Zi Klamkin, Jonathan Monticone, Francesco Gu, Tingyi Optics Metasurface has emerged as a powerful platform for controlling light at subwavelength thickness, enabling new functionalities for imaging, polarization manipulation, and angular momentum conversion within a flat surface. We explored an integrated asymmetric metasurface simultaneously achieving broadband, low loss forward power transmission, and significant back reflection sup-pression in multi-mode waveguides. The tapering along the direction of light propagation leads to low loss and space-efficient mode conversion. Enhanced by a double-flipped structure, a thin (2.5 micrometer) metasurface can simultaneously achieve high conversion efficiency (>80 percent), and back-reflection efficiency of 90 percent over a 200 nm wavelength range. Such single sided reflectors can be one of the enabling components for gain-integrated adaptive optics on a chip. |
| title | Broadband Low-loss Unidirectional Reflection On-chip with Asymmetric Dielectric Metasurface |
| topic | Optics |
| url | https://arxiv.org/abs/2506.06872 |