Light focusing by silicon nanosphere structures under conditions of magnetic dipole and quadrupole resonances

Journal of Physics: Conference Series(2021)

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摘要
Abstract Metalens is a planar device for light focusing. In this work, we design and optimize c-Si nanosphere metalenses working on the magnetic dipole and quadrupole resonances of the c-Si nanoparticle. Resonant optical response of c-Si nanostructures is simulated by the multipole decomposition method along with the zero-order Born approximation. Limitations of this approach are investigated. The obtained results of optimization are verified by simulation via the T-matrix method.
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