Spherical Plasmon Open Resonator for Omnidirectional Superscattering
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Solution Overview
Problem
Existing technologies face limitations in enhancing the scattering cross section of subwavelength objects, restricting miniaturization and integration of antennas and detection devices, and current strategies are ineffective for all-directional and all-polarization wave scattering.
Innovation Solution
A spherical designer electromagnetic surface plasmon open resonator with a resonator inner core and outer shell, fabricated using metal or resin materials, featuring a scattering cross section greater than its geometric cross section, and capable of scattering linearly polarized electromagnetic waves from any direction, utilizing a negative refractive index and spoof surface plasmon resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the geometric size of the object is increased to enhance scattering ability, then the scattering cross section is improved, but the device size increases which contradicts the requirement for miniaturization
Solution Approach 1:
The patent changes the electromagnetic parameters of the resonator (size, shape, material properties) to tune the resonance frequency and scattering characteristics. By adjusting these parameters, the resonator achieves enhanced scattering cross-section at subwavelength scales without increasing physical size, directly resolving the contradiction between scattering ability and miniaturization
Solution Approach 2:
The patent employs composite structures combining different materials with complementary electromagnetic properties. The resonator uses materials with specific permittivity and permeability characteristics to achieve strong magnetic dipole and electric quadrupole resonances, enabling enhanced scattering from subwavelength objects without scaling up the device size
2Area of stationary object
If conventional strategies are used to increase scattering cross section, then scattering is enhanced for specific polarization, but the scattering capability is limited to two-dimensional situations and cannot handle all directions and polarizations
Solution Approach 1:
The patent designs the resonator with multiple resonance modes (magnetic dipole, electric quadrupole, and higher-order modes) that are simultaneously excited by incident electromagnetic waves from any direction and with any polarization. This multi-functional resonance capability enables the resonator to scatter waves universally across all incident angles and polarization states, not just for specific configurations
Solution Approach 2:
The patent employs a spherical or spheroidal resonator geometry with curved surfaces, which provides isotropic scattering characteristics. The spherical symmetry ensures that the resonator responds equally to electromagnetic waves incident from all directions, and the curved surface geometry supports multiple resonance modes that handle various polarization states, achieving all-directional and all-polarization scattering capability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resonator achieves enhanced scattering for waves from all directions and polarizations, supporting miniaturized devices with adjustable frequency and improved sensitivity, enabling applications in small wide-aperture antennas and energy collectors.
Implementation Method 1
spherical designer electromagnetic surface plasmon open resonator
Implementation Method 2
The resonator outer shell has an effective negative refractive index n
Data Source
AI summary
A spherical designer electromagnetic surface plasmon open resonator is provided. The open resonator includes a resonator inner core and a resonator outer shell. The resonator inner core is located in an inner center of the resonator outer shell, and the resonator inner core and the resonator outer shell are coaxial. The disclosure provides a device that implements the superscattering function for incident waves in all incident directions and in all polarization directions, and a spherical open resonator is implemented. The scattering cross section of the disclosure can be more than five times greater than that of a metal sphere of the same size, and the operating frequency can be flexibly designed. By utilizing the characteristic that the scattering cross section of the spherical designer electromagnetic surface plasmon resonator is much greater than its own geometric cross section, the electromagnetic super-scattering device can be implemented.