Nanoscale Phononics, Photonics, and Polaritonic Processes

Nanoscale optical, electronic, phononic and vibrational properties of materials are critical for the development of many future technologies in energy and information systems. However, understanding these responses down to the nanometer level remains a challenge, for example, the spatial resolution of conventional optical probes is often limit by the wavelength of visible of IR photons. We are using small focused electron beam to probe these excitations in solids down to the atomic level to gain an understanding how structure influences these important materials properties.  

Recent Publications:

  1. Spectroscopic Observation and Modeling of Photonic Modes in CeO2 Nanocubes, arXiv preprint arXiv:2210.04945, 2022
  2. Vibrational spectroscopy at atomic resolution with electron impact scattering, Nature Physics, 2019
  3. Vibrational electron energy loss spectroscopy in truncated dielectric slabs, Physical Review B, 2018
  4. Nanoscale Probing of Local Hydrogen Heterogeneity in Disordered Carbon Nitrides with Vibrational Electron Energy-Loss Spectroscopy, ACS Nano, 2018
  5. The influence of surfaces and interfaces on high spatial resolution vibrational EELS from SiO2, Microscopy, 2018
  6. Vibrational and valence aloof beam EELS: A potential tool for nondestructive characterization of nanoparticle surfaces, Ultramicroscopy, 2017