81 citations · 203 across the 9 of their papers we have counts for
9 papers
Giant natural optical rotation from chiral electromagnons in a collinear antiferromagnet
D. Maluski, M. Langenbach, D. Szaller +8
In NiTeO with a chiral crystal structure, we report on a giant natural optical rotation of the lowest-energy magnon. This polarization rotation, as large as 140 deg/mm, cor…
Magnetic-field-induced critical dynamics in magnetoelectric TbPO
Christoph P. Grams, Markus Grüninger, Joachim Hemberger
We report on the magnetoelectric dynamics in the linear magnetoelectric antiferromagnet TbPO studied by broadband dielectric spectroscopy. For the phase transition into the mag…
Self-normalizing phase measurement in multimode terahertz spectroscopy based on photomixing of three lasers
K. Thirunavukkuarasu, M. Langenbach, A. Roggenbuck +4
Photomixing of two near-infrared lasers is well established for continuous-wave terahertz spectroscopy. Photomixing of three lasers allows us to measure at three terahertz frequenc…
Critical slowing down near the multiferroic phase transition in MnWO
D. Niermann, C. P. Grams, P. Becker +3
By using broadband dielectric spectroscopy in the radiofrequency and microwave range we studied the magnetoelectric dynamics in the multiferroic chiral antiferromagnet MnWO. Ab…
Group delay in THz spectroscopy with ultra-wideband log-spiral antennae
M. Langenbach, A. Roggenbuck, I. Cámara Mayorga +4
We report on the group delay observed in continuous-wave terahertz spectroscopy based on photomixing with phase-sensitive homodyne detection. We discuss the different contributions…
Infrared-active phonon modes in monoclinic multiferroic MnWO4
T. Möller, P. Becker, L. Bohaty +2
We report on polarized infrared reflectivity measurements of multiferroic, monoclinic MnWO4 between 10K and 295K. The full dielectric tensor and the frequency dependence of the ori…
Domain dynamics in the multiferroic phase of MnWO4
D. Niermann, C. P. Grams, M. Schalenbach +5
By using broadband linear and nonlinear dielectric spectroscopy we studied the magnetoelectric dynamics in the chiral antiferromagnet MnWO4. In the multiferroic phase the dielectri…
Enhancing the stability of a continuous-wave terahertz system by photocurrent normalization
A. Roggenbuck, M. Langenbach, K. Thirunavukkuarasu +6
In a continuous-wave terahertz system based on photomixing, the measured amplitude of the terahertz signal shows an uncertainty due to drifts of the responsivities of the photomixe…
Dielectric properties of charge ordered LuFe2O4 revisited: The apparent influence of contacts
Daniel Niermann, Florian Waschkowski, Joost de Groot +2
We show results of broadband dielectric measurements on the charge ordered, proposed to be mul- tiferroic material LuFe2O4. The temperature and frequency dependence of the complex…