Integrated Photonic Responsive Material Sensor for Magnetometry
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Solution Overview
Problem
Existing magnetometer technologies face challenges such as high size, weight, and power consumption, requirement of cryogenic refrigeration, inability to operate in earth fields, and the need for multiple sensors to provide vector information.
Innovation Solution
The development of an integrated photonic responsive material sensor system that includes a carrier wafer with a cavity and a responsive waveguide made from material that shifts resonance frequencies in response to forces, allowing for precise detection of magnetic fields using a single chip with integrated waveguides and active components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SQUID or atomic-based magnetometry is used to achieve high sensitivity, then measurement precision is improved, but device complexity and power consumption increase due to cryogenic refrigeration requirements
Solution Approach 1:
The patent replaces the mechanical cryogenic refrigeration system with an integrated photonic sensor platform that operates at room temperature. The sensor uses photonic crystal cavities and waveguides to detect magnetic fields through optical means, eliminating the need for complex mechanical cooling infrastructure while maintaining high sensitivity through resonant optical detection methods.
Solution Approach 2:
The patent changes the operating temperature parameter from cryogenic conditions to room temperature by using photonic crystal structures with high quality factors. The resonant optical detection method enables sensitive magnetic field measurement without requiring low-temperature operation, fundamentally changing the thermal operating parameters of the system.
2Measurement precision
If SQUID is used to achieve high sensitivity, then measurement precision is improved, but weight and power consumption increase due to cryogenic refrigeration
Solution Approach 1:
The patent replaces the heavy cryogenic refrigeration machinery with a compact integrated photonic circuit. The sensor platform uses planar photonic crystal structures that can be fabricated on standard semiconductor substrates, dramatically reducing the weight from kilograms to grams while maintaining sensitivity through optical resonance detection.
3Measurement precision
If atomic-based magnetometers are used to achieve high sensitivity, then measurement precision is improved, but adaptability decreases due to inability to operate in earth field
Solution Approach 1:
The patent modifies the operating conditions by designing photonic crystal structures with quality factors that enable resonant detection at room temperature in the presence of earth's magnetic field. The optical resonance frequency can be tuned to operate alongside the earth field rather than requiring field-free conditions, enabling deployment in realistic environmental conditions.
4Measurement precision
If multiple sensors are used to provide vector information, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent designs a single integrated photonic sensor platform that can measure all three components of the magnetic field vector. By using a single photonic crystal cavity with multiple coupling waveguides arranged in different orientations, the system obtains complete vector information from one sensor unit rather than requiring three separate sensors, reducing overall system complexity.
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 system enhances manufacturability and accuracy of magnetometers by decoupling the integration of waveguides from active components, enabling high-yield production of magnetometers that can operate with increased sensitivity and precision in earth fields.
Implementation Method 1
a responsive waveguide formed from responsive material that is responsive to a force by shifting a resonance frequency of point defects in the responsive material in response to the force
Implementation Method 2
a pump light is directed to the responsive waveguide to prepare the responsive waveguide to absorb a probe light when exposed to a radio frequency at the resonance frequency of the point defects
Data Source
AI summary
Systems for an integrated photonic responsive material sensor are described herein. In certain embodiments, a system includes a carrier wafer that includes a cavity formed in the carrier wafer. The carrier wafer also includes a responsive waveguide coupled to the cavity, the responsive waveguide formed from responsive material responsive to a force by shifting a resonance frequency of point defects in the responsive material in response to the force, wherein a pump light is directed to the responsive waveguide to prepare the responsive waveguide to absorb a probe light when exposed to a radio frequency at the point defect resonance frequency. Additionally, the system includes components coupled to the carrier wafer, wherein the components include a probe light source that generates the probe light, wherein the components are positioned in relation to the carrier wafer to couple the probe light into the cavity.