Affiliation:
1. Xiamen University
2. Shenzhen Research Institute of Xiamen University
Abstract
Superoscillation refers to a phenomenon where a band-limited wave locally oscillates faster than its highest Fourier component. Current research on optical superoscillations predominantly lies on the basis of free-space waves. As the optical waveguides play a key role in energy and information transportation, guided waves with precisely controlled deep-subwavelength features offers unprecedented flexibility for applications. In this Letter, we numerically show that, by superimposing eigenmodes of a multimode SiO2 waveguide and forcing the resultant field to pass through a set of predetermined points, superoscillatory fields in various shapes can be formed in preset cross-sectional planes. Furthermore, by padding prescribed intensities in multiple cross sections, we successfully create a persistent superoscillatory saddle.
Funder
Basic and Applied Basic Research Foundation of Guangdong Province
Fundamental Research Funds for the Central Universities
Natural Science Foundation of Fujian Province
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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