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9 November 2016 A new concept to design high efficiency surface plasmon meta-couplers (Conference Presentation)
Shulin Sun
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Proceedings Volume 9921, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV; 99211O (2016) https://doi.org/10.1117/12.2237463
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
Surface plasmon polaritons (SPPs) have found numerous applications in photonics, but traditional devices to excite them (such as grating and prism couplers) all suffer inherent low-efficiency issues, since the generated SPPs can decouple back to free space and the reflection at the device surface can never be avoided. Here, based on a transparent gradient metasurface, we propose a new SPP-excitation scheme and numerically demonstrate that it exhibits inherently high efficiency ( 94%), since the designed meta-coupler kills both the decoupling and the reflection at its surface. As a proof of concept, we fabricate a meta-coupler in the microwave regime, and combine near- and far-field experiments to demonstrate that the achieved SPP-excitation efficiency reaches 75%, which is several times higher than all other available devices. Our findings can inspire the designs and realizations of high-performance plasmonic devices to harvest light-matter interactions.
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Shulin Sun "A new concept to design high efficiency surface plasmon meta-couplers (Conference Presentation)", Proc. SPIE 9921, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV, 99211O (9 November 2016); https://doi.org/10.1117/12.2237463
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KEYWORDS
Reflection
Surface plasmons
Plasmonics
Free space
Light-matter interactions
Microwave radiation
Photonics
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