Terahertz detection based on nonlinear Hall effect without magnetic field
Abstract
Despite the enormous potential of terahertz technology, fast, sensitive, and broadband terahertz detection at room temperature has been a challenge. We propose a method for long-wavelength photodetection using topological quantum materials without invoking any diode or junction region. The inherently quadratic relation between transverse current and input voltage at zero magnetic field is used to rectify the incident terahertz or infrared electric field into a direct current. We identify the Weyl semimetal NbP and ferroelectric semiconductor GeTe for terahertz/infrared photodetection with large current responsivity without external bias.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 17, 2021
- Source ID
- 10.1073/pnas.2100736118
Entities
People
- Liang Fu
- Yang Zhang
Organizations
- Massachusetts Institute of Technology
- Simons Foundation
- United States Army Research Laboratory