Integrated NV Diamond Magnetic Sensor with On-Chip RF Circuitry
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Solution Overview
Problem
Magnetic sensor systems based on nitrogen vacancy (NV) centers in diamond face challenges due to the separate components for optical excitation sources, RF excitation sources, and optical detectors, leading to increased size, weight, and efficiency losses from fluorescence emission.
Innovation Solution
A magnetic sensor assembly with a diamond assembly on a base substrate, integrating NV centers, RF excitation sources, optical excitation sources, and optical detectors on the same or related substrates, such as a silicon wafer, with RF excitation sources directly on the NV diamond material and optical detectors on the diamond material to reduce size and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are used for optical excitation sources, RF excitation sources, and optical detectors, then each component can be optimized independently, but the overall system size and weight increase
Solution Approach 1:
The patent combines multiple separate components (optical excitation source, RF excitation source, optical detector) onto a single substrate, creating an integrated sensor system. This merging reduces the overall system size and weight while maintaining the functional optimization of each individual component through dedicated design areas on the substrate.
2Reliability
If separate components are used for optical excitation sources, RF excitation sources, and optical detectors, then each component can be optimized independently, but the device complexity increases
Solution Approach 1:
The patent integrates multiple components onto a single substrate, which reduces the mechanical assembly complexity and alignment requirements while maintaining functional optimization. The integration simplifies the overall device structure by eliminating the need for separate mounting and interconnection of multiple discrete components.
3Ease of manufacture
If optical detectors are separated from the NV diamond material, then detector design is simplified, but fluorescence emission losses increase
Solution Approach 1:
The patent positions the optical detector in close proximity to the NV diamond material, effectively nesting the detection function near the source of fluorescence emission. This proximity minimizes energy loss from fluorescence emission while the detector remains a separate, independently designed component on the substrate.
4Volume of moving object
If RF excitation sources are formed on the NV diamond material, then the system size is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent forms the RF excitation source directly on the NV diamond material, integrating both components in close proximity. This merging reduces the overall system size while the manufacturing precision is managed through coordinated fabrication processes that account for the tight spatial relationship between the RF source and NV centers.
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 integration results in a compact, cost-effective, and efficient NV diamond sensor system, reducing size and weight, minimizing fluorescence loss, and enabling use in small consumer and industrial products.
Implementation Method 1
a radio frequency (RF) excitation source formed on the NV diamond material
Implementation Method 2
minimizing fluorescence loss
Data Source
AI summary
A magnetic sensor assembly includes a base substrate and a material assembly. The material assembly is formed on the base substrate. The material assembly includes an assembly substrate. A magneto-optical defect center material having a plurality of magneto-optical defect centers is formed on the assembly substrate. A radio frequency (RF) excitation source is formed on the magneto-optical defect center material.