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- W3003649535 abstract "For applications in portable electronic devices and machine vision, a small sized focus-tunable lens or lens system is highly desired. Materials with electrically tunable optical refractive indices are required in these fields. A functional material consisting of a WS2 thin film on a SiC substrate was synthesized and reported in our investigation. A 15-nm-thick WS2 film was deposited on an n-doped SiC substrate (7.37 × 1019 cm − 3) by pulsed laser deposition. The optical refractive index of the WS2 / SiC material was found to be electrically tunable. The value of the effective optical refractive index ranged from 4.03 to 5.84, which implies a 44.9% variation in the refractive index change, at a wavelength of 460 nm under an applied external DC voltage modulated in the range of 0 to 7 V. We also found experimentally that the focal length of the plane lens was tunable from 184 to 156 mm at a wavelength of 650 nm with the applied voltage ranging from 0 to 7 V. Our investigation presents a new way to modulate the refractive index and make the compact focus-tunable lens design convenient." @default.
- W3003649535 created "2020-02-07" @default.
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- W3003649535 date "2020-01-28" @default.
- W3003649535 modified "2023-10-16" @default.
- W3003649535 title "Electrically tunable optical refractive index of a WS2 film on a SiC substrate" @default.
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- W3003649535 doi "https://doi.org/10.1117/1.oe.59.1.017107" @default.
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