Terahertz Time-Domain Magnetospectroscopy of a High-Mobility Two-Dimensional Electron Gas

Abstract

We have observed cyclotron resonance in a high-mobility GaAs/AlGaAs two-dimensional electron gas by using the techniques of terahertz time-domain spectroscopy combined with magnetic fields. From this, we calculate the real and imaginary parts of the diagonal elements of the magnetoconductivity tensor, which in turn allows us to extract the concentration, effective mass, and scattering time of the electrons in the sample. We demonstrate the utility of ultrafast terahertz spectroscopy, which can recover the true linewidth of cyclotron resonance in a high-mobility ($>{10}^6\mathrm{c}{\mathrm{m}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$) sample without being affected by the saturation effect.

4 pages, 3 figures

References in corpus (1)

• Fiber-coupled Antennas for Ultrafast Coherent Terahertz Spectroscopy in Low Temperatures and High Magnetic Fields

Cited by in corpus (18)

• Carbon Nanotube Terahertz Polarizer
• Dicke Superradiance in Solids
• Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases
• Collective Antenna Effects in the Terahertz and Infrared Response of Highly Aligned Carbon Nanotube Arrays
• Single-Shot Terahertz Time-Domain Spectroscopy in Pulsed High Magnetic Fields
• Terahertz Coherent Control of a Landau-Quantized Two-Dimensional Electron Gas
• Direct Measurement of Cyclotron Coherence Times of High-Mobility Two-Dimensional Electron Gases
• Time-Domain Terahertz Spectroscopy in High Magnetic Fields
• Superconducting complementary metasurfaces for THz ultrastrong light-matter coupling
• A table-top, repetitive pulsed magnet for nonlinear and ultrafast spectroscopy in high magnetic fields up to 30 T
• Review of Anisotropic Terahertz Material Response
• Terahertz Faraday and Kerr rotation spectroscopy of Bi${}_{1-x}$Sb${}_x$ films in high magnetic fields up to 30 Tesla
• Multimode Ultrastrong Coupling in Three-Dimensional Photonic-Crystal Cavities
• Rapid Scanning Terahertz Time-Domain Magnetospectroscopy with a Table-Top Repetitive Pulsed Magnet
• Terahertz magneto-optical spectroscopy of two-dimensional hole and electron systems
• Optical-pump terahertz-probe spectroscopy in high magnetic fields with kHz single-shot detection
• Magneto-optical Spectroscopy with RAMBO: A Table-Top 30 T Magnet
• Observation of Colossal Terahertz Magnetoresistance and Magnetocapacitance in a Perovskite Manganite