Vortex Beam Device Using Dielectric Resonator Array
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing V antenna structures for generating vortex beams are small and difficult to produce, and their metal composition leads to significant light absorption and loss.
Innovation Solution
A vortex beam generation device comprising a metal reflector covered by a low refractive index layer and multiple elliptical dielectric elements, where the elliptical elements are arranged in an array with their major axes parallel or coincident, and the dielectric elements are made of materials like Si or Si3N4, reducing light absorption and facilitating production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a metal V antenna structure is used to generate vortex beams, then the device can effectively generate orbital angular momentum beams, but the metal structure absorbs incident light resulting in relatively large loss
Solution Approach 1:
The patent changes the material parameter from metal to dielectric material (such as silicon or silicon nitride). This fundamental material parameter change eliminates the high light absorption loss inherent in metal structures while maintaining the vortex beam generation capability through dielectric resonance effects.
Solution Approach 2:
The patent employs a composite structure consisting of dielectric material elements arranged in a specific geometric pattern on a substrate. This composite approach combines the low-loss property of dielectric materials with the functional vortex generation capability, achieving both reduced energy loss and effective orbital angular momentum beam generation.
2Ease of manufacture
If a metal V antenna structure is used to generate vortex beams, then the device can effectively generate orbital angular momentum beams, but the structure is relatively small and not conducive to production
Solution Approach 1:
The patent divides the vortex beam generation function into multiple discrete dielectric elements arranged in an array pattern. Each element can be independently fabricated using standard semiconductor processing techniques, and their collective arrangement produces the desired vortex beam. This segmentation makes the device much more amenable to mass production while maintaining reliability.
Solution Approach 2:
The patent replaces the mechanical metal V antenna structure with a dielectric resonator array that operates on different physical principles. This substitution enables compatibility with semiconductor fabrication processes, dramatically improving manufacturability while achieving the same optical function through dielectric resonance rather than metal scattering.
3Loss of energy
If dielectric materials are used instead of metal structures, then light absorption loss is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent simplifies the device structure by changing the operating principle from metal-based scattering to dielectric resonance. This parameter change eliminates the need for complex metal patterning and allows the use of standard dielectric deposition and etching processes, reducing overall structural complexity while achieving lower loss.
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 device effectively generates vortex beams with reduced light absorption, offering a simpler production process and improved efficiency by using dielectric materials that minimize loss and enhance the generation of orbital angular momentum beams.
Implementation Method 1
When incident light is emitted onto the vortex beam generation device, resonance of the elliptical dielectric elements is caused, so that an amplitude and a phase of reflected light are changed
Implementation Method 2
A refractive index of the low refractive index layer is less than a refractive index of the elliptical dielectric element
Implementation Method 3
a metal reflector, a low refractive index layer, and multiple elliptical dielectric elements, where the metal reflector is covered by the low refractive index layer
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A vortex beam device includes: a metal reflector (101), a low refractive index layer (102), and multiple elliptical dielectric elements (103). The metal reflector (101) is covered by the low refractive index layer (102). The multiple elliptical dielectric elements (103) are embedded in the low refractive index layer (102). The multiple elliptical dielectric elements (103) are arranged in an array. Straight lines on which major axes of the multiple elliptical dielectric elements (103) are located are parallel or coincident. The multiple elliptical dielectric elements (103) have a same thickness. A thickness of the low refractive index layer (102) is greater than a thickness of the elliptical dielectric element (103). An outer surface of each elliptical dielectric element (103) is flush with an outer surface of the low refractive index layer (102). The outer surface of the elliptical dielectric element and the outer surface of the low refractive index layer (102) are both surfaces that are relatively distant from the metal reflector (101). A refractive index of the low refractive index layer (102) is less than a refractive index of the elliptical dielectric element (103). A vortex beam device production method and a vortex beam generation method are also disclosed.