Corrective Regridding Techniques for Non-Uniform Sampling in Time Domain Terahertz Spectroscopy

ORAL

Abstract

Time domain terahertz spectrometers using optical delay stages inherently suffer from non-uniform sampling positions. We review, simulate, and experimentally test the ability of corrective cubic spline and Shannon regridding algorithms to mitigate the inherent sampling position noise. Simulation and experimental results show that regridding increases the signal to noise ratio within the frequency range of 100 GHz to 2 THz. We apply these techniques to study cyclotron resonance of 2DEGs in AlGaAs/GaAs quantum wells and predict that regridding corrections will become increasingly important to both spectroscopy and imaging as THz technology continues to improve.

*Partial support has been provided by the Institute for Materials Research at OSU under grant EMRG-G00030.

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Presenters

  • Alex Potts

    • Department of Electrical and Computer Engineering, The Ohio State University

Authors

  • Alex Potts

    • Department of Electrical and Computer Engineering, The Ohio State University

  • Thuc Mai

    • Department of Physics, Ohio State Univ - Columbus
    • Physics, Ohio State University - Columbus
    • Center for Emergent Materials. Department of Physics, The Ohio State University
    • Department of Physics , The Ohio State University

  • Matthew Warren

    • Department of Physics, Ohio State Univ - Columbus
    • Center for Emergent Materials. Department of Physics, The Ohio State University

  • Evan Jasper

    • Department of Physics, Ohio State Univ - Columbus

  • Rolando Valdes Aguilar

    • Department of Physics, Ohio State Univ - Columbus
    • Center for Emergent Materials. Department of Physics, The Ohio State University
    • Physics, Ohio State University - Columbus
    • Ohio State Univ - Columbus
    • Department of Physics , The Ohio State University