Journal
OPTICS LETTERS
Volume 43, Issue 6, Pages 1255-1258Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.001255
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Funding
- National Natural Science Foundation of China (NSFC) [61008028]
- National Key Research and Development Program [2016YFB1102203, 2017YFF0107003]
- 111 Project of China [B07014]
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We report on both the theoretical and experimental design of a black phosphorus (BP)-based reflective linear polarizer on Si/SiO2 substrate in visible range using the Fabry-Perot cavities method. Thanks to the optical anisotropy of BP, polarization wavelength regulation and a high extinction ratio are achievable via optimizing the thickness of BP. Using azimuth-dependent reflectance difference micros-copy, we directly measured a huge optical anisotropy of 1.58, corresponding to an extinction ratio of similar to 9 dB, from a 96 nm BP on a silicon substrate capped by 260 nm thermally oxidized silicon at a wavelength of 690 nm for the first time, to the best of our knowledge. Our results not only provide a new route to designing nanoscale polarizers based on anisotropic two-dimensional (2D) materials, promoting the application of 2D materials in integrated optoelectronics and system-on-chip, but also suggest a modulation technique for optical anisotropy by integrating the BP film with cavity structures. (C) 2018 Optical Society of America
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