Defect Spin Localization Using Electron Mapping Beyond Optical Resolution
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Solution Overview
Problem
Existing methods for imaging defects in materials, particularly solids, are limited by diffraction resolution, preventing the accurate localization of closely spaced defects, especially in quantum applications where higher spatial resolution is necessary.
Innovation Solution
A method involving electron excitation and mapping of emitted electrons from defects using aberration-corrected transmission electron microscopy, combined with electron optics and detectors, achieves spatial resolutions down to 0.1 nm, enabling precise localization of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical detection with high numerical aperture microscope objective is used, then defect localization is achieved, but spatial resolution is limited to half the wavelength of detection light
Solution Approach 1:
The patent replaces optical detection with electron-based detection. Instead of using photons and optical microscopes, the invention uses electrons excited from defects, detected by electron optics and electron multipliers, achieving spatial resolution limited only by electron wavelength rather than light wavelength.
Solution Approach 2:
The patent changes the detection parameter from optical wavelength to electron wavelength. By using electrons with de Broglie wavelengths much smaller than visible light, the spatial resolution improves from hundreds of nanometers to sub-nanometer scale, enabling resolution of closely spaced defects.
2Measurement precision
If pixel-by-pixel scanning methods like STED or STORM are used, then diffraction-limited resolution is surpassed, but imaging speed decreases and large numbers of defects cannot be observed
Solution Approach 1:
The patent replaces sequential optical scanning with parallel electron detection. The electron optics system can detect multiple defects simultaneously across the entire field of view, eliminating the need for slow pixel-by-pixel scanning while achieving super-resolution through electron's short wavelength.
Solution Approach 2:
The patent creates an electron copy of the defect distribution. By exciting electrons from defects and mapping their positions, the system generates a high-resolution image of all defects simultaneously, rather than reconstructing images through slow sequential scanning of individual pixels.
3Measurement precision
If conventional electron microscopy is used, then high spatial resolution is achieved, but the method cannot specifically localize defects with trapped electrons
Solution Approach 1:
The patent applies local quality by making the electron excitation defect-specific. Only electrons associated with defects having trapped electrons are excited and emitted, while electrons in perfect lattice regions remain unaffected. This selective excitation enables specific localization of defects with the high spatial resolution of electron microscopy.
Solution Approach 2:
The patent changes the detection parameter to exploit the unique electronic state of defects. By using excitation energies that match the binding energy of trapped electrons at defects, the system selectively excites and detects only defect-associated electrons, providing defect-specific imaging with nanometer resolution.
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 method allows for high-resolution imaging of defects with spatial resolutions of 0.1 nm to 20 nm, facilitating quantum applications by resolving interactions between closely spaced spins and enabling quantum computing and sensing.
Implementation Method 1
the electron is excited such that it is emitted from the material
Data Source
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AI summary
The present invention relates to a method by means of which defects in materials, preferably in solid bodies (18), can be localized with considerably higher spatial resolution than before. With the present invention, such defects can be quickly and economically imaged with high spatial resolution. Above all, with the present invention it is possible to contactlessly spin-selectively excite and capture or image defects in the solid body with high sensitivity, high dynamic range, large field of view and excellent resolution which far exceeds the present capabilities of optical detection processes. Furthermore, with the process according to the invention there is an excellent possibility for detecting spin even in individual images, wherein high contrast of the spin states and better fidelity of reproduction of the spin states are made possible. The device (10) according to the invention and the process according to the invention are also extremely useful for quantum calculation using defect spins in solid bodies (18), for quantum-capable capturing and for quantum-capable measurement networks.