This week's Colloquium in Physics & Astronomy

Frequency-Domain Approach to THz Spectroscopy of Aqueous Solutions Mr Daniel Hellmich Chalmers University of Technology 11:00, Tuesday 13 October 2026 Physics Seminar Room (Building 46/5081) The strong absorption of terahertz waves by water makes terahertz spectroscopy of aqueous solutions extremely challenging. As an alternative to the widely used time-domain technique, we present a frequency-domain approach based on electronic heterodyne techniques combined with a quasi-optical setup to face this challenge. A basic introduction about terahertz electronics will be followed by our terahertz spectroscopy setup and preliminary measurement results of proteins in aqueous solutions.

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