A5043768346- Mechanical and Optical Resonators
- Force Microscopy Techniques and Applications
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced MEMS and NEMS Technologies
- Ultrasonics and Acoustic Wave Propagation
- Nanopore and Nanochannel Transport Studies
- Lipid Membrane Structure and Behavior
- Near-Field Optical Microscopy
- Advanced Electron Microscopy Techniques and Applications
- Analytical Chemistry and Sensors
- Diamond and Carbon-based Materials Research
- Acoustic Wave Resonator Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Quantum Information and Cryptography
- Microfluidic and Bio-sensing Technologies
- Analog and Mixed-Signal Circuit Design
- Advanced MRI Techniques and Applications
- Nanowire Synthesis and Applications
ETH Zurich
2019-2024
McGill University
2020
Magnetic resonance force microscopy (MRFM) is a scanning probe technique capable of detecting MRI signals from nanoscale sample volumes, providing paradigm-changing potential for structural biology and medical research. Thus far, however, experiments have not reached suffcient spatial resolution retrieving meaningful information samples. In this work, we report MRFM imaging scans demonstrating 0.9 nm localization precision 0.6 in one dimension. Our progress enabled by an improved spin...
Nanoscale magnetic resonance imaging (NanoMRI) is an active area of applied research with potential applications in structural biology and quantum engineering. The success this technological vision hinges on improving the instrument's sensitivity functionality. A particular challenge optimization field gradient required for spatial encoding radio frequency used spin control, analogy to components clinical MRI. In work, we present fabrication characterization a magnet-in-microstrip device...
We report spatially resolved measurements of static and fluctuating electric fields over conductive (Au) nonconductive (SiO_{2}) surfaces. Using an ultrasensitive "nanoladder" cantilever probe to scan these surfaces at distances a few tens nanometers, we record changes in the resonance frequency damping that associate with fields, respectively. find be correlated. Furthermore, are similar magnitude for two materials. quantitatively describe observed effects on basis trapped surface charges...
The Kerr Parametric Oscillator (KPO) is a nonlinear resonator system that often described as synthetic two-level system. In the presence of noise, switches between two states via fluctuating trajectory in phase space, instead following straight path. such trajectories makes it hard to establish precise count or even useful definition, “lifetime” state. Addressing this issue, we compare several rate counting methods allow estimate lifetime for levels. particular, peak Allan variance...
Ultrasensitive nanomechanical sensors are envisioned to enable nanoscale magnetic resonance imaging (nano-MRI) and other scanning force microscopy applications. However, their sensitivity very small forces makes such susceptible unwanted tip-surface interactions that cause bending instability. This study shows how these noncontact affect measurements. The authors present strategies overcome the challenges of overcoupling, which lead successful demonstration faithful nano-MRI reconstruction...
Significance Optical properties of materials are governed by nanoscale charge motion induced ultrafast light fields. Here, we demonstrate that the electrostatic force originating from light-induced electron in a dielectric can be measured using atomic microscopy. We observe changes second-order nonlinear optical interactions sample on sub-15-nm scale and 100-fs time resolution. The resolution is set pulse characteristics, not sensor. Our method does rely tip–sample interactions, thus...
Magnetic Resonance Force Microscopy (MRFM) describes a range of approaches to detect nuclear spins with mechanical sensors. MRFM has the potential enable magnetic resonance imaging (MRI) near-atomic spatial resolution, opening up exciting possibilities in solid state and biological research. In many cases, spin-mechanics coupling is engineered help periodic radio-frequency pulses. this paper, we report that such pulses can result unwanted parametric amplification vibrations, causing...
Magnetic resonance force microscopy (MRFM) describes a range of approaches to detect nuclear spins with mechanical sensors. MRFM has the potential enable magnetic imaging near-atomic spatial resolution, opening up exciting possibilities in solid state and biological research. In many cases, spin-mechanics coupling is engineered help periodic radio frequency pulses. this paper, we report that such pulses can result unwanted parametric amplification vibrations, causing misinterpretation...
Nanoscale magnetic resonance imaging (NanoMRI) is an active area of applied research with potential use in structural biology and quantum engineering. The success this technological vision hinges on improving the instrument's sensitivity functionality. A particular challenge optimization field gradient required for spatial encoding, radio-frequency used spin control, analogy to components clinical MRI. In work, we present fabrication characterization a magnet-in-microstrip device that yields...
Long and thin scanning force cantilevers are sensitive to small forces, but also vulnerable detrimental non-contact interactions. Here we present an experiment with a cantilever whose spring constant static deflection dominated by the interaction between tip surface, regime that refer as ``overcoupled''. The interactions obstacle for ultrasensitive measurements like nanoscale magnetic resonance imaging (nanoMRI). We discuss several strategies overcome challenges presented overcoupling,...