Time-domain measurement of terahertz frequency magnetoplasmon resonances in a two-dimensional electron system by the direct injection of picosecond pulsed currents

Jingbo Wu,A Giles Davies,John E Cunningham,Alexander S Mayorov,Lianhe Li,Divyang Mistry,Christopher D Wood,Edmund H Linfield,Oleksiy Sydoruk

doi:10.1063/1.4943173

Abstract

We have investigated terahertz (THz) frequency magnetoplasmon resonances in a two-dimensional electron system through the direct injection of picosecond duration current pulses. The evolution of the time-domain signals was measured as a function of magnetic field, and the results were found to be in agreement with calculations using a mode-matching approach for four modes observed in the frequency range above 0.1 THz. This introduces a generic technique suitable for sampling ultrafast carrier dynamics in low-dimensional semiconductor nanostructures at THz frequencies.

Highlights

Time-domain measurement of terahertz frequency magnetoplasmon resonances in a two-dimensional electron system by the direct injection of picosecond pulsed currents
The evolution of the time-domain signals was measured as a function of magnetic field
the results were found to be in agreement with calculations using a mode-matching approach

Summary

Introduction

Time-domain measurement of terahertz frequency magnetoplasmon resonances in a two-dimensional electron system by the direct injection of picosecond pulsed currents.

Results

Conclusion