Compliant Solid-State Spin Sensor Head for Magnetic Field Mapping
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Solution Overview
Problem
Existing quantum sensing systems face challenges in achieving high-resolution magnetic field mapping across varying sample geometries, particularly due to limitations in fine control of sensor position and orientation, and maintaining contact with non-planar or uneven sample surfaces.
Innovation Solution
A system comprising an optical microscope, a sensor head with a solid-state substrate and color center ensemble, an actuator for controlled linear displacement and rotation, an optical driving system, and a magnetic field generator, which enables precise alignment and contact with the sample surface, allowing for high-resolution magnetic field mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is aligned with the focal plane for high-resolution imaging, then measurement precision is improved, but the sensor cannot maintain contact with non-planar or uneven sample surfaces
Solution Approach 1:
The sensor head is made dynamically adjustable through an actuator system that enables real-time repositioning and reorientation. This allows the sensor to adapt its position and orientation to match the local geometry of the sample surface while maintaining alignment with the focal plane for high-resolution measurements.
Solution Approach 2:
The system changes the positional and orientational parameters of the sensor head to accommodate different sample geometries. By adjusting these parameters dynamically, the sensor maintains both contact with the sample surface and alignment with the focal plane across varying sample shapes and surfaces.
2Reliability
If the sensor position is fixed for stable measurements, then reliability is improved, but fine control of position and orientation cannot be achieved
Solution Approach 1:
The actuator system provides dynamic control of the sensor head position and orientation, enabling fine adjustments while maintaining stable measurements. The system can transition between adjustment modes and stable measurement modes, providing both fine control capability and measurement reliability.
3Area of stationary object
If the sensor maintains contact with the sample surface, then measurement coverage is improved, but the sensor cannot accommodate multi-axis displacements and rotations
Solution Approach 1:
The actuator system enables the sensor head to dynamically adjust its position and orientation across multiple degrees of freedom. This allows the sensor to maintain contact with the sample surface while accommodating multi-axis displacements and rotations, thereby expanding the measurable sample area.
Solution Approach 2:
The system adds dimensional flexibility by enabling multi-axis displacements and rotations of the sensor head. This allows the sensor to adapt to three-dimensional sample geometries and maintain contact across larger and more complex sample areas.
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 system provides adaptability and high-resolution magnetic field mapping capabilities across diverse sample geometries, ensuring precise measurements and effective data generation for various applications.
Implementation Method 1
Color centers, when subjected to a magnetic field, can exhibit changes in their quantum spin states, which can be detected through optically detected magnetic resonance (ODMR)
Implementation Method 2
producing a bias magnetic field within the solid-state substrate with a magnetic field generator
Data Source
AI summary
A solid-state spin sensor system for precisely measuring magnetic fields with a compliantly coupled sensor head exhibiting translational and rotational compliance is disclosed. The sensor includes a color center ensemble in a solid-state substrate for detecting magnetic fields with high spatial resolution. An optical microscope, in conjunction with an optical driving system, facilitates viewing and spin polarization of the color center ensemble. A magnetic field generator ensures biasing of the ensemble for better sensitivity, and a microwave driving system induces spin transitions within the ensemble. Actuation is controlled by a system responsive to force data or image data for precise positioning of the color center ensemble focally and in contact with a sample. The system generates a spatially resolved map of a magnetic field through analysis of fluorescence data. Methods for measuring and mapping fields with fiducials and force feedback are also included, enabling wide-field quantum sensing of irregular surfaces.