Abstract

We report the development of new terahertz (THz) 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, we have tested the performance of the techniques. We have made polarization modulation, high sensitivity ($<1\mathrm{mrad}$) narrowband rotation measurements with a cw optically pumped molecular gas laser, and, by combining the distinct advantages of THz time domain spectroscopy and polarization modulation techniques, we have demonstrated rapid broadband rotation measurements to $<5\mathrm{mrad}$ precision.

©2012 Optical Society of America

Giant tunable Faraday effect in a semiconductor magneto-plasma for broadband terahertz polarization optics

Takashi Arikawa, Xiangfeng Wang, Alexey A. Belyanin, and Junichiro Kono
Opt. Express 20(17) 19484-19492 (2012)

Step-scan time-domain terahertz magneto-spectroscopy

D. Molter, G. Torosyan, G. Ballon, L. Drigo, R. Beigang, and J. Léotin
Opt. Express 20(6) 5993-6002 (2012)

Polarization modulation time-domain terahertz polarimetry

C. M. Morris, R. Valdés Aguilar, A. V. Stier, and N. P. Armitage
Opt. Express 20(11) 12303-12317 (2012)

Tunable magneto-optical polarization device for terahertz waves based on InSb and its plasmonic structure

Qianyi Mu, Fei Fan, Sai Chen, Shitong Xu, Chuanzhong Xiong, Xin Zhang, Xianghui Wang, and Shengjiang Chang
Photon. Res. 7(3) 325-331 (2019)

Measurement of the infrared complex Faraday angle in semiconductors and insulators

M.-H. Kim, V. Kurz, G. Acbas, C. T. Ellis, and J. Cerne
J. Opt. Soc. Am. B 28(2) 199-207 (2011)