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

Journal Article · Mon Feb 29 00:00:00 EST 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4943173· OSTI ID:22591752

Wu, Jingbo; Mayorov, Alexander S.; Wood, Christopher D.; Mistry, Divyang; Li, Lianhe; Linfield, Edmund H.; Giles Davies, A.; Sydoruk, Oleksiy ^[1]

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1. Optical and Semiconductor Devices Group, Department of Electrical and Electronic Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ (United Kingdom)

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.

• OSTI ID: 22591752
• Journal Information: Applied Physics Letters, Vol. 108, Issue 9; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARRIERS
EVOLUTION
FREQUENCY RANGE
MAGNETIC FIELDS
NANOSTRUCTURES
SAMPLING
SEMICONDUCTOR MATERIALS
SIGNALS
TWO-DIMENSIONAL SYSTEMS