Dresden 2026 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 20: Poster I

HL 20.19: Poster

Tuesday, March 10, 2026, 18:00–20:00, P1

Surface acoustic wave spectroscopy on low dimensional semiconductor materials — •Paul Hollatz, Felix Ehring, Paromita Bhattacharjee, Emeline Nysten, and Hubert Krenner — Intitute of Physics, University of Münster, Germany

For future technologies, low-dimensional quantum materials such as 2D transition metal dichalcogenides (TMDCs), 1D Nanowires, or 0D Quantum Dots (QDs) are of highest relevance.

Studying the properties of such semiconductor nanomaterials can be achieved by various methods, including the combination of surface acoustic wave (SAW) spectroscopy and photoluminescence (PL) measurements, which provides unique access to carrier dynamics.

In this approach, SAWs operating in the MHz to GHz regime enable on-chip integration due to their micro- to nanometer wavelengths.

Here, we show that interaction of a SAW with co-integrated materials via its strain and the electrical field enables contact-free sensing and manipulation of their optical properties.

When combined with time-integrated and time-resolved PL measurements, it reveals excitation pathways and charge-carrier behaviour, offering deeper insight into the fundamental processes that govern these materials and paving the way for advanced optoelectronic applications.

Keywords: Surface acoustic waves; Low dimensional materials; Photoluminescence