Bloch-wave interferometry of driven quasiparticles in bulk GaAs

Seamus D. O'Hara, Joseph B. Costello, Qile Wu, Ken West, Loren Pfeiffer, Mark S. Sherwin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We show that the polarizations of sidebands emitted from bulk gallium arsenide driven by a strong terahertz (THz) field while probed with a weak near-infrared laser can be viewed as interferograms from a Michelson-like interferometer for Bloch waves. The fringe contrast of an interferogram is a measure of the nonequilibrium dephasing of Bloch waves in this strongly driven system. An interferogram's oscillation frequency is determined by, among other factors, the THz field strength FTHz and the reduced masses of electron-hole pairs. A simple analytic model brings all measured and calculated spectra into agreement with adjustment of only a single dephasing constant, and predicts the scaling of interferograms with FTHz.

Original languageEnglish (US)
Article number054308
JournalPhysical Review B
Volume109
Issue number5
DOIs
StatePublished - Feb 1 2024
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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