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Enhanced absorption in all-dielectric metasurfaces due to magnetic dipole excitation

Pavel D. TerekhovCenter for Quantum Information Science and Technology, Ben-Gurion University, Beer-Sheva, 8410501, IsraelKseniia V. BaryshnikovaITMO University, 49 Kronversky Ave, 197101, St. Petersburg, RussiaYakov GreenbergCenter for Quantum Information Science and Technology, Ben-Gurion University, Beer-Sheva, 8410501, IsraelYuan Hsing FuData Storage Institute, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-01, Innovis, Singapore, 138634, SingaporeAndrey B. EvlyukhinITMO University, 49 Kronversky Ave, 197101, St. Petersburg, RussiaAlexander S. ShalinITMO University, 49 Kronversky Ave, 197101, St. Petersburg, RussiaAlina KarabchevskyCenter for Quantum Information Science and Technology, Ben-Gurion University, Beer-Sheva, 8410501, Israel. [email protected]

2019en

ABI

Annotatsiya

All-dielectric nanophotonics lies at a forefront of nanoscience and technology as it allows to control light at the nanoscale using its electric and magnetic components. Bulk silicon does not experience any magnetic response, nevertheless, we demonstrate that the metasurface made of silicon parallelepipeds allows to excite the magnetic dipole moment leading to the broadening and enhancement of the absorption. Our investigations are underpinned by the numerical predictions and the experimental verifications. Also surprisingly we found that the resonant electric quadrupole moment leads to the enhancement of reflection. Our results can be applied for a development of absorption based devices from miniature dielectric absorbers, filters to solar cells and energy harvesting devices.

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DOI: 10.1038/s41598-019-40226-0

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