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3 October 2024 Plasmonic-dielectric hybrid metasurfaces for emission and sensing application
Wen-Hui Cheng, Yu-Chia Wang, Si-Chen Li
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Proceedings Volume PC13111, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII; PC131110P (2024) https://doi.org/10.1117/12.3028803
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
The remarkable turnability with many degrees of freedom of metasurface has allowed for significant advancements in the field of optics. The direction and polarization of photon emission may be adjusted by coupling the geometric plasmonic metasurfaces with the dielectric Si cavity mode. Maintaining the Purcell factor, the hybrid structure with the designed configuration exhibits the highest electric field and best cross-polarization conversion efficiency. Through simulation, the Pancharatnam-Berry (PB) phase structure is effectively used to control the emission wavefront of both chiral and dipole emitters. One key characteristic for sensing applications is the enantiomeric interaction between chiral molecules and circularly polarized light. We use silicon disk metamaterials in conjunction with the P-B phase antenna to provide higher selectivity for real-time chiral sensing. It is also possible to enhance Circular Dichroism (CD) measurement. Experimental demonstration is conducted using L- and D-glucose.
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Wen-Hui Cheng, Yu-Chia Wang, and Si-Chen Li "Plasmonic-dielectric hybrid metasurfaces for emission and sensing application", Proc. SPIE PC13111, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII, PC131110P (3 October 2024); https://doi.org/10.1117/12.3028803
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KEYWORDS
Molecular interactions
Silicon
Dielectrics
Electric fields
Molecules
Photon polarization
Plasmonics
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