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9 March 2024 Real-time and real-space tracking of coherent lattice vibrations using optical nonlinear spectroscopy
Tran Trung Luu
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Proceedings Volume PC12884, Ultrafast Phenomena and Nanophotonics XXVIII; PC1288407 (2024) https://doi.org/10.1117/12.3002815
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
The probing of coherent lattice vibrations in solids has been conventionally carried out using time resolved transient or reflection spectroscopy where only the relative oscillation amplitude can be obtained. Here we demonstrate that, using standard optical nonlinear spectroscopy, electron-phonon and anharmonic phonon-phonon coupling and their relaxation dynamics can be probed in real time. In combination with optical deformable potential calculated from ab-initio density functional theory, our measurement with absolute amplitude information reveals the maximum, controllable displacement of neighbouring oxygen atoms in alpha-quartz crystal to tens of picometers in real space.
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Tran Trung Luu "Real-time and real-space tracking of coherent lattice vibrations using optical nonlinear spectroscopy", Proc. SPIE PC12884, Ultrafast Phenomena and Nanophotonics XXVIII, PC1288407 (9 March 2024); https://doi.org/10.1117/12.3002815
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KEYWORDS
Nonlinear optics
Spectroscopy
Transient nonlinear optics
Optical coherence
Optical spectroscopy
Optical tracking
Phonons
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