THz Time-Domain Magneto-spectroscopy of GaAs 2DEG in the 25 T Split-Florida Helix

ORAL

Abstract

We have developed a gas plasma based THz time--domain spectrometer (TTDS) coupled with an air-breakdown coherent detection (ABCD) system, to study Landau quantized 2 DEG samples, in the 25 T Split-Florida Helix magnet at the National High Magnetic Field Laboratory (NHMFL). Through the use of non-linear optics, we achieved a larger bandwidth (approx. 0.1-10 THz) compared to traditional fiber-based experimental techniques. We used this system to perform the first high magnetic field TTDS measurements on a high mobility GaAs 2DEG sample. 1. Zhang, et al., Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases. Physical Review Letters 113, 047601 (2014). 2. T. Arikawa, et al, Terahertz Coherent Control of a Landau-Quantized Two-dimensional Electron Gas, Physical Review B 84, 241307 (2011).

*This work is supported by the National Science Foundation under Grant Nos. DMR-1056827 (JAC and DJH), DMR-1229217 (SAM and DJH), DMR-1409473 (DK),) DMR-1157490 (NHMFL) and DOE DE-SC0012635 (DK and DJH).

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Authors

  • Ashlyn D. Burch

    • University of Alabama at Birmingham

  • J.A. Curtis

    • National High Magnetic Field Lab
    • University of Alabama at Birmingham

  • A.G. Linn

    • University of Alabama at Birmingham

  • B. Barman

    • University of Alabama at Birmingham

  • M.J. Stiles

    • University of Alabama at Birmingham

  • J.L. Reno

    • Sandia National Labs
    • Sandia National Laboratory

  • Steve McGill

    • National High Magnetic Field Lab
    • National High Magnetic Field Laboratory
    • Natl High Magnetic Field Lab, Tallahassee, FL, USA

  • D. Karaiskaj

    • Univ of South Florida
    • University of South Florida

  • D.J. Hilton

    • University of Alabama at Birmingham