Complex medium structure optical mode decomposition method under special point light source and related device

The finite difference time domain method is used to establish a three-dimensional geometric model and numerical simulation, decompose the electromagnetic field information of complex medium structures, and generate a comprehensive three-dimensional far-field radiation pattern, which solves the shortcomings of the optical mode decomposition method in the existing technology, and realizes the accurate analysis of complex medium structures under special point light sources.

CN120409135APending Publication Date: 2025-08-01JINAN UNIVERSITY
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Patent Information

Application Number
CN202510638986.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-19
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

The existing optical mode decomposition methods are difficult to accurately describe the multipole mode contribution and interaction of complex medium structures under the irradiation of special point light sources such as dipole sources, and cannot effectively analyze their optical characteristics.

Method used

A finite difference time domain method is used to establish a three-dimensional geometric model of complex medium structures, and the electromagnetic field distribution information is determined through numerical simulation, and multiple multipole modes are obtained by performing multi-level decomposition. Combined with far-field radiation information, a comprehensive three-dimensional far-field radiation pattern is generated to reflect the optical characteristics of complex medium structures.

Benefits of technology

It accurately reflects the multipole mode contribution and interaction of complex dielectric structures under special point light sources, improves the accuracy and reliability of optical characteristic analysis, and is suitable for practical application scenarios.

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Abstract

The invention discloses an optical mode decomposition method for a complex medium structure under a special point light source and a related device, and relates to the technical field of nano photonics and optical engineering.The method comprises the steps that a finite difference time domain method is adopted, and a three-dimensional geometric model of the complex medium structure is established; based on the three-dimensional geometric model, performing numerical simulation by adopting a finite difference time domain method, and determining electromagnetic field distribution information of the complex medium structure under the irradiation of a special point light source; performing multi-stage decomposition on the electromagnetic field distribution information to obtain a plurality of multi-pole sub-modes; respectively determining two-dimensional far-field radiation information of each multi-pole sub-mode based on the plurality of multi-pole sub-modes; and combining the two-dimensional far-field radiation information of each multi-pole sub-mode to obtain a comprehensive three-dimensional far-field radiation pattern. The optical characteristics of the complex medium structure under the irradiation of the special point light source can be effectively analyzed, and the multipole mode contribution and interaction of the complex medium structure under the irradiation of the special point light source can be accurately reflected.
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