期刊
NANOSCALE HORIZONS
卷 5, 期 7, 页码 1088-1095出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nh00139b
关键词
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资金
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2020R1A2B5B02002730]
- BK21 Plus Project in 2020 [21A20131612805]
- Global PhD fellowship - NRF-MSIT of the Korean government [NRF-2016H1A2A1906519]
- NRF grant - NRF-MSIT of the Korean government [CAMM-2019M3A6B3030637]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2020R1A2C2006389]
- National Research Foundation of Korea [2020R1A2C2006389, 2016H1A2A1906519, 2020R1A2B5B02002730] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Dynamically reconfigurable nanoscale tuning of visible light properties is one of the ultimate goals both in the academic field of nanophotonics and the optics industry demanding compact and high-resolution display devices. Among various efforts incorporating actively reconfigurable optical materials into metamaterial structures, phase-change materials have been in the spotlight owing to their optical tunability in wide spectral regions including the visible spectrum. However, reconfigurable modulation of visible light intensity has been limited with small modulation depth, reflective schemes, and a lack of profound theoretical background for universal design rules. Here, all-dielectric phase-change Fano metasurface gratings are demonstrated for strong dynamic full-space (reflection and transmission) modulation of visible intensities based on Fano resonances. By judicious periodic couplings between densely arranged meta-atoms containing VO2, phase-change induced thermo-optic modulation of full-space intensities is highly enhanced in the visible spectrum. By providing intuitive design rules, we envision that the proposed study would contribute to nanophotonics-enabled optoelectronics technologies for imaging and sensing.
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