Spatio-spectral decomposition of complex eigenmodes in subwavelength nanostructures through transmission matrix analysis.

ABSTRACT: Exploiting multiple near-field optical eigenmodes is an effective means of designing, engineering, and extending the functionalities of optical devices. However, the near-field optical eigenmodes of subwavelength plasmonic nanostructures are often highly multiplexed in both spectral and spatial distributions, making it extremely difficult to extract individual eigenmodes. We propose a novel mode analysis method that can resolve individual eigenmodes of subwavelength nanostructures, which are superimposed in conventional methods. A transmission matrix is constructed for each excitation wavelength by obtaining the near-field distributions for various incident angles, and through singular value decomposition, near-field profiles and energy spectra of individual eigenmodes are effectively reso

SUBMITTER: Jin YH 

PROVIDER: S-EPMC11501628 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature