Gap surface plasmon
A Gap surface plasmon (GSP) can arise when electromagnetic radiation of the right wavelength meets a solid metasurface built up from a subwavelength thin dielectric spacer sandwiched between an optically thick metal film and arrays of metal sub-wavelength elements arranged in a strictly or quasi-periodic fashion.[1] [2]
Metasurfaces are two-dimensionally arranged metamaterials with uniquely engineered at the nanoscale to have properties in the spectral and spatial manipulation of electromagnetic waves. They are ultra-thin planar structures and offer extraordinary phase shift, amplitude modulation or polarization transition by patterning nanoscale dense antenna arrays or slits. [3] [4] Plasmons arise in and travel across the surface of the plane.
A plasmon is a quasiparticle which arises from the quantization of plasma oscillations and these are confined in the geometry of the material to the carefully engineered gaps.
The term gap refers to the gap between the layers in the metamaterial called a metasurface.
See also
- Patch antenna - an antenna variant that is particularly suitable for implementation on printed circuit boards as a 2 dimensional surface. They are the microwave analogue of gap surface plasmons.
References
- ^ Ding, Fei; Chen, Yiting; Bozhevolnyi, Sergey I. (2020-05-01). "Gap-surface plasmon metasurfaces for linear-polarization conversion, focusing, and beam splitting". Photonics Research. 8 (5): 707–714. doi:10.1364/PRJ.386655. ISSN 2327-9125.
- ^ Fei Ding*, Yuanqing Yang, Rucha A. Deshpande and Sergey I. BozhevolnyiA review of gap-surface plasmon metasurfaces: fundamentals and applications , Nanophotonics 2018; https://www.researchgate.net/publication/325182879_A_review_of_gap-surface_plasmon_metasurfaces_Fundamentals_and_applications
- ^ Guo, Jingjing; Tu, Yan; Yang, Lanlan; Zhang, Ruiwen; Wang, Lili; Wang, Baoping (2017-10-26). "Electrically Tunable Gap Surface Plasmon-based Metasurface for Visible Light". Scientific Reports. 7 (1): 14078. doi:10.1038/s41598-017-14583-7. ISSN 2045-2322.
- ^ Pors, Anders (2016-04-01). "Gap plasmon-based metasurfaces: fundamentals and applications (Conference Presentation)". 9883: 98830R. doi:10.1117/12.2228014.
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