A5090301977- Spectroscopy and Quantum Chemical Studies
- Photorefractive and Nonlinear Optics
- Laser-Plasma Interactions and Diagnostics
- Advanced Electron Microscopy Techniques and Applications
- Advanced Chemical Physics Studies
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Particle Accelerators and Free-Electron Lasers
- High-pressure geophysics and materials
- Advanced X-ray Imaging Techniques
- Spectroscopy and Laser Applications
- Magneto-Optical Properties and Applications
- Solid-state spectroscopy and crystallography
- Laser-Matter Interactions and Applications
- Pulsed Power Technology Applications
- Terahertz technology and applications
- Magnetic properties of thin films
Stanford University
2024
University of Florida
2021-2023
University of California, Berkeley
2021
We demonstrate a silicon-based electron accelerator that uses laser optical near fields to both accelerate and confine electrons over extended distances. Two dielectric (DLA) designs were tested, each consisting of two arrays silicon pillars pumped symmetrically by pulse front tilted beams, designed for average acceleration gradients 35 $50\text{ }\text{ }\mathrm{MeV}/\mathrm{m}$, respectively. The DLAs are act as alternating phase focusing (APF) lattices, where electrons, depending on the...
Solid-state electrolytes overcome many challenges of present-day lithium ion batteries, such as safety hazards and dendrite formation1,2. However, detailed understanding the involved dynamics is missing due to a lack in operando measurements with chemical interfacial specificity. Here we investigate prototypical solid-state electrolyte using linear nonlinear extreme-ultraviolet spectroscopies. Leveraging surface sensitivity extreme-ultraviolet-second-harmonic-generation spectroscopy,...
The coexistence of ferroelectricity and metallicity seems paradoxical, since the itinerant electrons in metals should screen long-range dipole interactions necessary for ordering. recent discovery polar metal LiOsO3 was therefore surprising [as discussed earlier Y. Shi et al., Nat. Mater. 2013, 12, 1024]. It is thought that coordination preferences Li play a key role stabilizing phase, but an investigation from combined viewpoints core-state specificity symmetry has yet to be done. Here, we...
Ferroelectric materials contain a switchable spontaneous polarization that persists even in the absence of an external electric field. The coexistence ferroelectricity and metallicity material appears to be illusive, since is ill-defined metals, where itinerant electrons are expected screen long-range dipole interactions necessary for ordering. surprising discovery polar metal, LiOsO3 has generated interest searching new metals motivated by prospects exotic quantum phenomena such as...
Second harmonic generation (SHG) spectroscopy ubiquitously enables the investigation of surface chemistry, interfacial as well symmetry properties in solids. Polarization-resolved SHG visible to infrared regime is regularly used investigate electronic and magnetic order through their angular anisotropies within crystal structure. However, increasing complexity novel materials emerging phenomena hampers interpretation experiments solely based on hybridized valence states. Here,...
We demonstrate a silicon-based electron accelerator that uses laser optical near fields to both accelerate and confine electrons over extended distances. Two dielectric (DLA) designs were tested, each consisting of two arrays silicon pillars pumped symmetrically by pulse front tilted beams, designed for average acceleration gradients 35 50 MeV/m respectively. The DLAs are act as alternating phase focusing (APF) lattices, where electrons, depending on the electron-laser interaction phase,...