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5 October 2023 Nonlinear spectroscopy with classical and quantum light to probe coherent dynamics of excitons
Ajay Ram Srimath Kandada, Esteban Rojas Gatjens, David Tiede, Lorenzo Uboldi, Katherine Koch, Evan Kumar, Eric Bittner
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Proceedings Volume PC12650, Physical Chemistry of Semiconductor Materials and Interfaces XXII; PC1265009 (2023) https://doi.org/10.1117/12.2677338
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Coherent nonlinear spectroscopy offers us a window into the system-bath interactions in materials. Specifically, the spectral lineshapes can reveal the nature and dynamics of the environmental fluctuations surrounding the system of interest. Here we will discuss how stochastic non-equilibrium exciton dynamics manifest in the peculiar lineshapes and how they provide mechanistic insights into the nature of exciton-phonon and exciton-exciton interactions in nanostructured derivatives of metal halide perovskites. Despite the success of such classical optical probes in unveiling the many-body physics in materials, we will elaborate on the ambiguities still present in the resultant photophysical models that stem primarily due to the high excitation intensities used in the measurements. We will also discuss alternative experimental methodologies based on quantum entangled photons, which may offer superior signal to noise ratio and thus enabling the measurement of many-body interactions at close to single photon excitation densities.
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Ajay Ram Srimath Kandada, Esteban Rojas Gatjens, David Tiede, Lorenzo Uboldi, Katherine Koch, Evan Kumar, and Eric Bittner "Nonlinear spectroscopy with classical and quantum light to probe coherent dynamics of excitons", Proc. SPIE PC12650, Physical Chemistry of Semiconductor Materials and Interfaces XXII, PC1265009 (5 October 2023); https://doi.org/10.1117/12.2677338
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KEYWORDS
Excitons
Quantum coherence
Spectroscopy
Quantum probes
Quantum light
Lead
Optical microcavities
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