Research

Time-resolved terahertz dynamics of quantum materials

  • Pump (800 nm - 15 μm) - THz (0.1 - 3 THz) probe spectroscopy
  • Floquet states
  • Topological Materials
  • Superconductors

THz time-resolved dynamics in topological insulator Bi2Se3

 

Terahertz spectroscopy of correlated electron systems

  • Quantum Magnets
  • 5d - transition metal oxides
  • High-Tc superconductors

IridateCond

Complex THz conductivity of Nd2Ir2O7 thin films

SFSO_absorption

Absorption coefficient of quantum magnet Sr2FeSi2O7 for several temperatures

DHeligman_summer2016_6

We are starting to fabricate THz metamaterials

 

Berry phase effects in quantum matter

  • Polarization-resolved terahertz spectroscopy
  • Anomalous Hall Effect
  • Inverse Spin Hall Effect

CircPol

Rebekah Smith_First Year Poster_RVA_revised

We are starting to look into the Berry phase effects in 5d-oxides.

GenerationThzWe can also now generate THz with spintronic trilayer structures. We are studying the effects of spin-orbit coupling in these structures to obtain the AC Spin Hall Angle.