Diamond Waveguide for NV Center Magnetometer Light Collection
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Solution Overview
Problem
Magneto-optical defect center materials, such as diamonds with nitrogen vacancy centers, face challenges in efficiently transmitting light emitted from defect centers to photo sensors, leading to reduced measurement accuracy and efficiency in magnetic field detection.
Innovation Solution
Incorporating a second portion without significant defect centers adjacent to the defect center portion, configured to facilitate the transmission of light generated by the defect centers, often using shaped waveguides to direct the light towards photo detectors, thereby increasing the amount of light detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light is transmitted directly from defect centers to photo sensors, then the structure is simple, but light transmission efficiency is low
Solution Approach 1:
A waveguide portion is introduced as an intermediary component between the defect center material and the photo sensor. The waveguide receives light emitted by defect centers and guides it to the photo sensor, increasing the fraction of collected photons while maintaining a relatively simple overall structure.
Solution Approach 2:
The waveguide extends the light transmission path in a directional manner, collecting light that would otherwise be emitted in random directions. This dimensional approach to light collection increases efficiency without requiring complex multi-element systems.
2Measurement precision
If defect centers are distributed throughout the entire material, then the material is homogeneous, but light transmission to sensors is reduced
Solution Approach 1:
The defect centers are concentrated in a specific region (first portion) adjacent to the waveguide, rather than being uniformly distributed throughout the entire material. This local concentration ensures that light is generated close to the waveguide entrance, maximizing coupling efficiency and reducing transmission losses.
3Loss of energy
If the second portion contains defect centers, then the material composition is uniform, but light transmission is absorbed
Solution Approach 1:
The second portion of the material, which forms the waveguide, is deliberately made free of defect centers. This creates a localized region with different properties (transparent and non-absorbing) that serves specifically for light transmission, while the first portion contains the defect centers for light generation.
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 configuration enhances the efficiency and accuracy of magnetic field detection by maximizing the transmission of light from defect centers to photo sensors, improving the overall performance of magneto-optical sensors.
Implementation Method 1
The second portion may be configured to facilitate transmission of light generated by the defect centers of the first portion away from the first portion
Implementation Method 2
Magneto-optical defect center materials such as diamonds with nitrogen vacancy centers can be used to determine an applied magnetic field by transmitting light into the diamond and measuring the responsive light that is emitted
Data Source
AI summary
A diamond can be used in a magnetometer to determine the strength of a magnetic field applied to the diamond. The diamond includes a first portion comprising a plurality of nitrogen vacancy (NV) centers dispersed throughout the first portion. The diamond also includes a second portion adjacent to the first portion. The second portion does not contain NV centers. The second portion is configured to facilitate transmission of light generated by the NV centers of the first portion away from the first portion.