Spin Ensemble Microwave Interposer for Uniform Field Control
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Solution Overview
Problem
Existing solid-state spin sensors face challenges in subjecting a spin ensemble to a uniform microwave field, which affects the accuracy and sensitivity of magnetic field measurements.
Innovation Solution
A metallized solid-state host with a dielectric substrate and microwave transmission lines is used to create a uniform alternating-current magnetic field across the spin ensemble, utilizing a metallized interposer with a ground plane and microwave transmission lines to guide microwave signals for precise electromagnetic field control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensing protocols using NV centers are used, then magnetic field sensing capability is achieved, but the control fields are insufficiently strong and uniform across the ensemble's spatial extents
Solution Approach 1:
The patent introduces a dielectric substrate with ground plane and microwave transmission lines as an intermediary structure between the spin ensemble and the measurement system. This intermediary enables precise electromagnetic field control through guided microwave signals, resolving the contradiction between achieving strong uniform fields and maintaining operational simplicity
Solution Approach 2:
The patent changes the electromagnetic parameters by using a dielectric substrate with specific microwave transmission line configurations. This transforms the microwave signal characteristics to produce highly uniform AC magnetic fields across the spin ensemble, improving measurement precision while maintaining ease of operation
2Measurement precision
If stronger control fields are applied to improve sensitivity, then magnetic field sensing sensitivity is enhanced, but electromagnetic interference and heating effects increase
Solution Approach 1:
The patent converts potentially harmful electromagnetic effects into beneficial outcomes by using the dielectric substrate and ground plane configuration. The structure guides microwave signals to produce strong uniform fields for enhanced sensitivity while the ground plane and dielectric properties minimize electromagnetic interference and reduce heating effects, turning potential harms into benefits
Solution Approach 2:
The patent applies local quality by creating highly uniform electromagnetic fields specifically at the location of the spin ensemble through the microwave transmission line configuration. The ground plane and dielectric substrate are designed to concentrate and uniformize the field where needed while containing electromagnetic interference elsewhere, thus enhancing sensitivity without proportionally increasing harmful effects
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 solution ensures highly uniform and strong electromagnetic fields are applied to the spin ensemble, enhancing the sensitivity and accuracy of magnetic field measurements while minimizing electromagnetic interference and heating effects.
Implementation Method 1
the microwave transmission lines guide a microwave signal that produces a uniform alternating current (AC) magnetic field across the solid-state spin ensemble
Implementation Method 2
uses an optically detected magnetic resonance (ODMR) spectrum to determine the NV ground-state transition frequencies, which experience Zeeman splitting as a function of the applied magnetic field
Implementation Method 3
a second, at least partially transparent conductive layer on a second face opposite the first face
Data Source
AI summary
Quantum technology possesses broad applicability across emerging quantum sensing and quantum computing markets. Described herein is a passive device integrating a solid-state spin ensemble, electromagnetic transmission lines, electromagnetic interference shielding, and a heat spreader for robust quantum state control over a wide range of temperatures and electromagnetic frequencies. Quantum state control is carried out by integrating the solid-state spin ensemble into the non-resonant electromagnetic transmission line network and applying one or more time-varying electromagnetic signals to the input(s) of the device.