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arXiv 2012-01-12 DOI 10.1364/JOSAB.29.001406 0 views

Terahertz Magneto Optical Polarization Modulation Spectroscopy

George, D. K. · Stier, A. V. · Ellis, C. T. · McCombe, B. D. · Černe, J. · Markelz, A. G.

Original · EN

We report the development of new terahertz techniques for rapidly measuring the complex Faraday angle in systems with broken time-reversal symmetry using the cyclotron resonance of a GaAs two-dimensional electron gas in a magnetic field as a system for demonstration of performance. We have made polarization modulation, high sensitivity (< 1 mrad) narrow band rotation measurements with a CW optically pumped molecular gas laser, and by combining the distinct advantages of terahertz (THz) time domain spectroscopy and polarization modulation techniques, we have demonstrated rapid broadband rotation measurements to < 5 mrad precision.

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