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TT: Fachverband Tiefe Temperaturen

TT 13: Focus Session: Magnetic Phenomena from Phonon Chirality and Angular Momentum II (joint session MA/TT)

TT 13.1: Talk

Tuesday, March 18, 2025, 09:30–09:45, H16

Continuous-wave terahertz spectroscopy on chiral phonons — •Ji Eun Lee, Luca Eisele, Artem Pronin, and Martin Dressel — 1. Physikalisches Institut, Universität Stuttgart, Germany

We apply continuous-wave frequency-domain terahertz spectroscopy to study chiral phonons at low frequencies. As samples, we use thin films of materials with soft phonon modes, such as SrTiO3 and (doped) PbTe. Our experimental method utilizes both, measurements of transmission with circular-polarized light and Faraday-rotation experiments. In the talk, our approach to the measurements and preliminary results will be summarized.

Keywords: chiral phonons; terahertz spectroscopy