Broadband Terahertz Time-domain Spectroscopy of Quantum Materials in a Dilution Refrigerator

Robert J. Vukelich; Tenzin Norden; Tracy G. Hastings; Mohan Giri; Michelle Caldwell; Shabnam Forutan; John L. Reno; David J. Hilton

Broadband Terahertz Time-domain Spectroscopy of Quantum Materials in a Dilution Refrigerator

Other Condensed Matter 2026-01-19 v1

Authors: Robert J. Vukelich , Tenzin Norden , Tracy G. Hastings , Mohan Giri , Michelle Caldwell , Shabnam Forutan , John L. Reno , David J. Hilton

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Abstract

We have constructed a terahertz time domain spectroscopy system using a Bluefors dilution refrigerator with a 7 T split-coil magnet. Using a gallium arsenide single quantum well sample, terahertz waveforms were measured at 145 mK in a magnetic field range from 0 to 6 Tesla to measure cyclotron resonance. Effective mass is found to be $0.073 m_{e}$ , which is larger than the commonly accepted bulk value of $0.068 m_{e}$ .

Keywords

terahertz time-domain spectroscopy quantum materials dilution refrigerator cyclotron resonance effective mass

Cite

@article{arxiv.2601.11506,
  title  = {Broadband Terahertz Time-domain Spectroscopy of Quantum Materials in a Dilution Refrigerator},
  author = {Robert J. Vukelich and Tenzin Norden and Tracy G. Hastings and Mohan Giri and Michelle Caldwell and Shabnam Forutan and John L. Reno and David J. Hilton},
  journal= {arXiv preprint arXiv:2601.11506},
  year   = {2026}
}

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10 pages, 5 figures

Broadband Terahertz Time-domain Spectroscopy of Quantum Materials in a Dilution Refrigerator

Abstract

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