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Fiber-coupled antennas for ultrafast coherent terahertz spectroscopy in low temperatures and high magnetic fields

Rev. Sci. Instrum. 73, 3258 (2002); doi:10.1063/1.1498904

Issue Date: September 2002

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S. A. Crooker
National High Magnetic Field Laboratory–LANL, MS E536, Los Alamos, New Mexico 87545
For the purposes of measuring the high-frequency complex conductivity of correlated-electron materials at low temperatures and high magnetic fields, a method is introduced for performing coherent time-domain terahertz spectroscopy directly in the cryogenic bore of existing dc and pulsed magnets. Miniature fiber-coupled THz emitters and receivers are constructed and are demonstrated to work down to 1.5 K and up to 17 T, for eventual use in higher-field magnets. Maintaining the submicron alignment between fiber and antenna during thermal cycling, obtaining ultrafast (<200 fs) optical gating pulses at the end of long optical fibers, and designing highly efficient devices that work well with low-power optical gating pulses constitute the major technical challenges of this project. Data on a YBCO superconducting thin film and a high mobility two-dimensional electron gas are shown. ©2002 American Institute of Physics.
History: Received 9 April 2002; accepted 6 June 2002
Permalink: http://link.aip.org/link/?RSINAK/73/3258/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.57.Pt
    Instruments, apparatus, and components common to several branches of physics and astronomy Infrared, submillimeter wave, microwave and radiowave instruments and equipment Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques
  • 42.81.Wg
    Optics Fiber optics Other fiber-optical devices
  • 84.37.+q
    Electronics; radiowave and microwave technology; direct energy conversion and storage Electric variable measurements (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)
  • 42.65.Re
    Optics Nonlinear optics Ultrafast processes; optical pulse generation and pulse compression
  • YEAR: 2002

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ISSN:
0034-6748 (print)   1089-7623 (online)
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