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5 November 2020 Modal confinement in patterned hybrid plasmonic waveguides
Guang Li, Peng Shi
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Proceedings Volume 11564, AOPC 2020: Optoelectronics and Nanophotonics; and Quantum Information Technology; 115640B (2020) https://doi.org/10.1117/12.2580145
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China
Abstract
Two types of patterned hybrid plasmonic waveguide structure are proposed to enhance the localization of light within a small modal area. With the presence of convex silicon ribs sandwiched between metal and highpermittivity material layers, the modal area can be dramatically reduced when compared with that of a normal hybrid plasmonic waveguide without significantly increased propagation losses. Analysis of the modal field distribution of the waveguides shows that this tight field localization is a result of the confinement in the vertical direction caused by the continuity of electric displacement field and horizontal confinement caused by mismatching of the wavevectors of the modes. An ultra-small modal area of less than one ten-millionth of the square of the wavelength can be achieved when using the proposed structure. These technologies are used in a ring resonator to demonstrate compact field confinement and an ultra-high-sensitivity sensor.
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Guang Li and Peng Shi "Modal confinement in patterned hybrid plasmonic waveguides", Proc. SPIE 11564, AOPC 2020: Optoelectronics and Nanophotonics; and Quantum Information Technology, 115640B (5 November 2020); https://doi.org/10.1117/12.2580145
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KEYWORDS
Plasmonic waveguides
Resonators
Waveguides
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