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26 February 2020 On-chip wavefront shaping with dielectric metasurface
Zi Wang, Tiantian Li, Lorry Chang, Feifan Wang, Yahui Xiao, Dun Mao, Thomas Kananen, Tingyi Gu
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Proceedings Volume 11290, High Contrast Metastructures IX; 112900I (2020) https://doi.org/10.1117/12.2540979
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Metasurfaces can be used for free-space wavefront shaping, which can generate an arbitrary phase shift with subwavelength thickness. We designed an integrated metasurface that can achieve on-chip spatial signal convertion with a ultracompact dimension and low loss (<1dB). The dielectric metalens integration can significantly reduce the taper length as well as making mechanically robust photonic crystal coupler with high transmission. The proposed integrated metasurfaces can be easily cascaded to achieve on-chip meta-system for signal processing. Here we demonstrated a metasystem that can perform the spatial differentiation and a deep learning meta-system that can achieve wavelength demultiplexing.
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Zi Wang, Tiantian Li, Lorry Chang, Feifan Wang, Yahui Xiao, Dun Mao, Thomas Kananen, and Tingyi Gu "On-chip wavefront shaping with dielectric metasurface", Proc. SPIE 11290, High Contrast Metastructures IX, 112900I (26 February 2020); https://doi.org/10.1117/12.2540979
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KEYWORDS
Wavefronts
Waveguides
Phase shifts
Dielectrics
Signal processing
Analog electronics
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