Wafer-Scale Waveguides for Integrated Photonics
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Solution Overview
Problem
Existing photonic technologies face challenges in integrating thin film waveguides with other photonic components due to limitations in geometry and propagation lengths, and there is a need for efficient coupling of light into and out of thin film waveguide structures.
Innovation Solution
The development of optical devices comprising a waveguide and an optical element, where the waveguide is a thin film material, such as van der Waals materials, and the optical element is disposed adjacent to the waveguide to alter the guided electromagnetic wave. This includes techniques for coupling external light sources to thin film waveguides by generating a converging laser beam and steering it towards the edge of the waveguide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If thin film waveguides are used for photonic integration, then device size is reduced and integration density is improved, but coupling efficiency with external light sources deteriorates
Solution Approach 1:
The patent introduces an optical element as an intermediary component disposed adjacent to the thin film waveguide. This optical element serves as a mediator that facilitates efficient coupling between external light sources and the waveguide, resolving the coupling efficiency problem while maintaining the compact device size advantage of thin film waveguides.
Solution Approach 2:
The patent positions the optical element in a spatial arrangement adjacent to the waveguide surface, utilizing three-dimensional space rather than planar integration only. This dimensional approach allows the optical element to interact with the waveguide at an optimized coupling point without increasing the footprint area, thus maintaining compactness while improving coupling efficiency.
2Length of stationary object
If thin film waveguides are used, then propagation length is extended to millimeter-scale, but integration with other photonic components becomes more difficult
Solution Approach 1:
The patent divides the photonic system into distinct functional segments: the thin film waveguide for long-distance propagation and the optical element for light manipulation. This segmentation allows each component to be optimized independently - the waveguide for extended propagation length and the optical element for efficient coupling - thereby reducing overall integration complexity while maintaining millimeter-scale propagation capabilities.
3Adaptability or versatility
If optical elements are added to manipulate guided waves, then functionality is enhanced, but device complexity increases
Solution Approach 1:
The patent employs an optical element that can perform multiple optical functions (coupling, steering, focusing) through a single component disposed adjacent to the waveguide. This multi-functional approach enhances the versatility of the photonic device without proportionally increasing complexity, as one optical element can replace what would otherwise require multiple separate components.
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
This approach enables efficient integration of thin film waveguides with other photonic components, allows for manipulation of guided waves, and achieves low loss propagation over millimeter-scale distances, thereby enhancing the capabilities of photonic integrated circuitry.
Implementation Method 1
A waveguide is a physical structure that guides the transmission of waves by restricting the transmission of energy within a particular geometry
Implementation Method 2
an optical element disposed adjacent a surface of the waveguide such that the optical element can alter, when the optical device is in operation, an electromagnetic wave guided by the waveguide
Data Source
AI summary
Systems and methods for generating and manipulating a guided electromagnetic wave in a waveguide are provided. The optical system includes a waveguide, such as a two-dimensional waveguide, and an optical element disposed adjacent the surface of the waveguide. To generate the guided electromagnetic wave, a converging laser beam is generated and coupled to the waveguide by steering the converging laser beam towards an edge of the waveguide and with a beam center trajectory approximately parallel to a surface of the waveguide.