Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 22: Biocompatible Organic Semiconductors
HL 22.2: Vortrag
Mittwoch, 11. März 2026, 09:45–10:00, POT/0006
A Nonlinear Organic Infrasound Sensor — •Maarten Mittmann1, Carsten Habenicht1, Andreas Hofacker1, Richard Kantelberg1, Stefan Jacob2, Hans Kleemann1, and Karl Leo1 — 1Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Dresden University of Technology, 01062 Dresden, Germany — 2National Metrology Institute (PTB), 38116 Braunschweig, Germany
Most works on speech recognition using reservoir computing focus on the nonlinear transformation of the data, which is fed electronically from a conventional sensor to the device. However, this approach necessitates two separate devices, consuming power and possibly requiring additional signal processing steps. In this work, we demonstrate that an efficient interface between acoustic stimulation and nonlinear, electronic output can be established using a free-standing viscoelastic film containing a poly(3,4-ethylenedioxythiophene) hexafluorophosphate (PEDOT:PF6) fiber organic electrochemical transistor (OECT). Upon application of a constant drain-source and gate-source voltage, the system shows a time-dependent, nonlinear modulation of the drain current when excited acoustically. This nonlinearity opens possibilities of combining the existing system with a reservoir computing approach to perform complex tasks like infrasound source discrimination and anomaly detection. The devices show great sensitivity within the order of magnitude of 102 mV Pa−1 in the infrasound frequency regime thanks to the amplification via the gate electrode.
Keywords: Organic; Semiconductor; Infrasound; Nonlinear; Sensing