High-Q collective Mie resonances in monocrystalline silicon nanoantenna arrays for the visible light.

ABSTRACT: Dielectric optical antennas have emerged as a promising nanophotonic architecture for manipulating the propagation and localization of light. However, the optically induced Mie resonances in an isolated nanoantenna are normally with broad spectra and poor Q -factors, limiting their performances in sensing, lasing, and nonlinear optics. Here, we dramatically enhance the Q -factors of Mie resonances in silicon (Si) nanoparticles across the optical band by arranging the nanoparticles in a periodic lattice. We select monocrystalline Si with negligible material losses and develop a unique method to fabricate nanoparticle arrays on a quartz substrate. By extinction dispersion measurements and electromagnetic analysis, we can identify three types of collective Mie resonances with Q -factors ∼ 500

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC11630676 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature