A5037386388- 2D Materials and Applications
- MXene and MAX Phase Materials
- Electronic and Structural Properties of Oxides
- Chalcogenide Semiconductor Thin Films
- Thermal properties of materials
- Spectroscopy and Quantum Chemical Studies
- Graphene research and applications
- Spectroscopy and Laser Applications
- Quantum Dots Synthesis And Properties
- Photorefractive and Nonlinear Optics
- Advanced Thermoelectric Materials and Devices
University of Chicago
2024-2025
Phonon dynamics and transport determine how heat is utilized dissipated in materials. In 2D systems for optoelectronics thermoelectrics, the impact of nanoscale material structure on phonon propagation central to controlling thermal conduction. Here, we directly observe in-plane coherent acoustic black phosphorus (BP) using ultrafast electron microscopy. We identify a significant reduction group velocities directions intermediate armchair zigzag lattice directions. Using machine...
Antiferroelectric (AFE) materials are excellent candidates for sensors, capacitors, and data storage due to their electrical switchability high-energy capacity. However, imaging the nanoscale landscape of AFE domains is notoriously inaccessible, which has hindered development intentional tuning materials. Here, we demonstrate that polarization-dependent photoemission electron microscopy can resolve arrangement orientation in-plane on nanoscale, despite absence a net lattice polarization....
Antiferroelectric (AFE) materials are excellent candidates for sensors, capacitors, and data storage due to their electrical switchability high-energy capacity. However, imaging the nanoscale landscape of AFE domains is notoriously inaccessible, which has hindered development intentional tuning materials. Here, we demonstrate that polarization-dependent photoemission electron microscopy (PD-PEEM) can resolve arrangement orientation in-plane on nanoscale, despite absence a net lattice...
Phonon dynamics and transport determines how heat is utilized or dissipated in materials. In anisotropic 2D materials for miniaturized optoelectronics thermoelectrics, the impact of material geometry nanoscale structure on phonon propagation central to controlling thermal conduction. Here, we directly observe {in-plane} intrinsically black phosphorus (BP) using ultrafast electron microscopy. We measure coherent acoustic group velocities along each Bravais lattice vectors (zigzag armchair) an...
Heterodyne detection is a ubiquitous tool in spectroscopy for the simultaneous of intensity and phase light. However, need stability hinders application heterodyne to electronic spectroscopy. We present an interferometric design phase-sensitive sum frequency generation (e-SFG) spectrometer time domain with lock-in detection. Our method continuous modulation one arm interferometer affords direct measurement between SFG local oscillator fields. Errors path length difference caused by drifts...