Berlin 2024 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 56: Many-body Quantum Dynamics II (joint session DY/TT)
DY 56.3: Vortrag
Freitag, 22. März 2024, 09:45–10:00, A 151
Equilibrium parametric amplification in Raman-cavity hybrids — •Hector Pablo Ojeda Collado1,2, Marios H. Michael3, Jim Skulte1,2, Angel Rubio3,4, and Ludwig Mathey1,2 — 1Center for Optical Quantum Technologies and Institute for Quantum Physics, University of Hamburg, 22761 Hamburg, Germany — 2The Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chausse 149, 22761 Hamburg, Germany — 4Center for Computational Quantum Physics, The Flatiron Institute, 162 Fifth Avenue, New York, New York 10010, USA
Parametric amplification have led to extraordinary photo-induced phenomena in recent pump-probe experiments. While these phenomena manifest themselves in out-of-equilibrium settings, in this work, we present the striking result of parametric amplification in equilibrium. We demonstrate that quantum and thermal noise of a Raman-active mode amplifies light inside a cavity when the Raman mode frequency is twice the cavity frequency. This noise-driven amplification leads to the creation of an unusual parametric Raman polariton with smoking gun signatures in Raman spectroscopy. We show distinctive properties of this polariton, including localization and static shift of the Raman mode, together with an increase of quantum light fluctuations within the cavity. Our study suggests a resonant mechanism for controlling Raman modes and thus matter properties by cavity fluctuations. We conclude by outlining how to compute the Raman-cavity coupling, and suggest possible experimental realizations.
Keywords: cavity-material engineering; Raman; parametric resonances