Advanced electron microscopy unlocks the secrets of quantum materials, enabling high-resolution characterization of their unique quantum properties.
By Rebecca Ingle, Ph.DApr 29 2024Reviewed by Lexie Corner Quantum technologies, and in particular quantum computing, are often heralded foundational to the next Industrial Revolution.1 The exploitation of quantum effects in devices, such as entanglement and coherences, is being explored to create new devices like quantum sensors, which may offer better detection limits and faster responses than traditional sensing technology.
The primary difference between SEM and TEM lies in the detection of electrons: SEM measures scattered electrons, while TEM captures those that pass directly through the sample. Despite these advancements, one of the biggest limitations of electron microscopy has been the issue of sample damage from the intense electron beams, which made it historically challenging to measure any live biological specimens or more fragile quantum materials.9
The power of electron microscopy in materials analysis lies in its outstanding spatial resolutions and the ability to combine with methods for elemental analysis and identification. For many materials, the high spatial resolution of electron microscopies is critical for answering many open questions in the field.
For electron microscopy, electron holography methods offer a route to very high spatial and temporal resolution measurements, which can be challenging with other methods due to the inherent space-charge in the electron beam. Holography is also well-suited to probing quantum mechanical effects, such as coherences in the emitted photoelectrons.13
Electron Microscopy Quantum Sensing
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