Fig. 1: Top: Schematics of proposed sub-THz Martin-Puplett scanning interferometer for MOKE spectroscopy. Bottom: Prototype test bench in development.
Quantum magnetism effects are extensively sought for in contemporary materials research. Recent studies of magneto-optical polar Kerr effect (MOKE), in which rotation of polarization is detected with high precision for beam reflected from surface of a quantum material, have emerged as key experimental probe to identify time-reversal-symmetry-breaking. Gaining the insights to the underlying mechanisms leading to the novel properties requires precise MOKE spectroscopy at sub-THz frequencies, which is extremely challenging with only limited toolset available.
Rutgers researchers have developed a novel magneto-optical polar Kerr effect spectrometer with unprecedented sub-mrad angular accuracy at sub-THz frequencies and high spectral resolution (Fig. 1).
- Spectroscopy of quantum materials
- Spectroscopy of chiral superconductors and anomalous Hall effect materials
- Spontaneously induced magnetic moments in quantum materials including quantum magnets and unconventional superconductors
- Unprecedented accuracy in complex Kerr angle measurements as a function of frequency in the sub-THz range
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