Electrode Positioning for Electro-Optical Waveguide Light Loss
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Solution Overview
Problem
Existing electro-optical modulator structures are not entirely satisfactory in terms of efficiency and light modulation, particularly due to the exposure of electrodes and vias to electric fields, leading to potential absorption of the electric field and resulting light intensity loss.
Innovation Solution
The proposed solution involves forming electrodes and vias in locations farther away from the waveguide, such that they are not exposed to the electric field generated by the light. This is achieved by extending the electrodes beyond the sides of the waveguide and positioning the vias and conductive connectors in a manner that they are not overlapped with the waveguide along the stacking direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If electrodes and vias are positioned close to the waveguide for compact design, then device area is reduced, but electric field absorption increases causing light intensity loss
Solution Approach 1:
The patent positions electrodes and vias in different spatial dimensions relative to the waveguide. Specifically, vias are placed laterally offset from the waveguide path, and electrodes are positioned above or below the waveguide in the stacking direction, creating three-dimensional separation that prevents electric field absorption while maintaining compact footprint
Solution Approach 2:
The patent introduces dielectric layers and insulating structures as intermediary elements between the electrodes/vias and the waveguide. These intermediaries electrically isolate the conductive components from the optical path, preventing direct electric field absorption while allowing the device to maintain a compact integrated structure
2Reliability
If electrodes extend beyond waveguide sides for better electrical connection, then electrical conductivity is improved, but exposure to electric field increases causing more light intensity loss
Solution Approach 1:
The patent extends electrodes in the stacking direction (vertical dimension) rather than laterally, allowing them to make robust electrical contact with bonding pads while remaining positioned above or below the waveguide plane. This vertical extension provides reliable electrical connection without increasing lateral exposure to the electric field
Solution Approach 2:
The patent applies different spatial positioning strategies to different components: electrodes are positioned above or below the waveguide for vertical extension, while vias are laterally offset from the waveguide path. This localized quality differentiation allows each component to achieve its functional requirement (electrical connection) without suffering from electric field absorption
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
By positioning the electrodes, vias, and conductive connectors away from the waveguide, the electric field is not absorbed by these components, thereby reducing the extinction of the electric field and minimizing light intensity loss, resulting in improved performance of the electro-optical device.
Implementation Method 1
a waveguide and a first electrode and a second electrode
Implementation Method 2
the electric field is not absorbed by these components, thereby reducing the extinction of the electric field and minimizing light intensity loss
Data Source
AI summary
An electro-optical device includes a waveguide and a first electrode and a second electrode. The first electrode and the second electrode at first and second sides of the waveguide, wherein the first electrode and the second electrode directly contact and extend beyond the first and second sides of the waveguide respectively.