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My research interest is Time-Resolved Vibrational Spectroscopy, applied to access ultrafast structural and dynamical properties at the molecular and condensed matter levels.
While the foundations of the atomic structure theory go back to more than a century ago, only in the recent decades the development of novel microscopy techniques have succeeded in acquiring “photographs” of molecular compounds, with atomic structural resolution. “Animating” these static pictures to monitor the atomic motions during the primary processes that govern physical, chemical and biological phenomena, carrying out a real molecular movie, is nowadays one of the greatest scientific challenges. Recording transient atomic motions in action would allow to unveil, for example, the mechanisms ruling phase transition processes in physics and to disclose bond breaking and recombination events in biochemistry. At the microscopic level, since the speed of atomic motion is ≈ 1 km s-1, the capability of measuring structural changes of reacting species over the atomic scale (a few ångström) on timescales short enough to resolve the reaction pathways requires ≈ 100 fs “exposure times”.
The impressive technological improvements in the last years, especially the advent of bright femtosecond laser sources, paved the way to a direct exploration of these temporal realms and have been foundational to ultrafast spectroscopy, in which light pulses are used to first excite (Pump) and subsequently interrogate (Probe) a system. Critically, the natural hindrance in this field revolves around the simultaneous need of two key ingredients: high temporal and spectral resolutions, which are mutually compromised due to the Heisenberg principle. Ultrafast electronic spectroscopies offer femtosecond time resolution, but cannot provide detailed information on the geometrical configuration of the system, due to the lack of structural sensitivity. On the other hand, vibrational spectroscopies, used to study molecular and solid state compounds, provide excellent spatial resolution but are ineffective on subpicosecond timescales.
In this respect, my work focuses on the development of experimental, conceptual and numerical protocls able to circumvent restrictions dictated by the Heisenberg principle for unravelling matter properties on picosecond and sub-picosecond time regimes. The main idea is to exploit Coherent Raman Spectroscopy for combining the structural sensitivity of vibrational specroscopy with the temporal resolution that can be achieved in Non-Linear Spectroscopy investigating a system of interest with multiple light pulses.
While the foundations of the atomic structure theory go back to more than a century ago, only in the recent decades the development of novel microscopy techniques have succeeded in acquiring “photographs” of molecular compounds, with atomic structural resolution. “Animating” these static pictures to monitor the atomic motions during the primary processes that govern physical, chemical and biological phenomena, carrying out a real molecular movie, is nowadays one of the greatest scientific challenges. Recording transient atomic motions in action would allow to unveil, for example, the mechanisms ruling phase transition processes in physics and to disclose bond breaking and recombination events in biochemistry. At the microscopic level, since the speed of atomic motion is ≈ 1 km s-1, the capability of measuring structural changes of reacting species over the atomic scale (a few ångström) on timescales short enough to resolve the reaction pathways requires ≈ 100 fs “exposure times”.
The impressive technological improvements in the last years, especially the advent of bright femtosecond laser sources, paved the way to a direct exploration of these temporal realms and have been foundational to ultrafast spectroscopy, in which light pulses are used to first excite (Pump) and subsequently interrogate (Probe) a system. Critically, the natural hindrance in this field revolves around the simultaneous need of two key ingredients: high temporal and spectral resolutions, which are mutually compromised due to the Heisenberg principle. Ultrafast electronic spectroscopies offer femtosecond time resolution, but cannot provide detailed information on the geometrical configuration of the system, due to the lack of structural sensitivity. On the other hand, vibrational spectroscopies, used to study molecular and solid state compounds, provide excellent spatial resolution but are ineffective on subpicosecond timescales.
In this respect, my work focuses on the development of experimental, conceptual and numerical protocls able to circumvent restrictions dictated by the Heisenberg principle for unravelling matter properties on picosecond and sub-picosecond time regimes. The main idea is to exploit Coherent Raman Spectroscopy for combining the structural sensitivity of vibrational specroscopy with the temporal resolution that can be achieved in Non-Linear Spectroscopy investigating a system of interest with multiple light pulses.
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arxiv(2024)
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arXiv (Cornell University) (2023)
The International Conference on Ultrafast Phenomena (UP) 2022 (2022)
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICAno. 15 (2022)
Optical Materials: X (2022): 100134-100134
The International Conference on Ultrafast Phenomena (UP) 2022 (2022)
The journal of physical chemistry lettersno. 38 (2021): 9239-9247
semanticscholar(2021)
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