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Avanessian C, Wang Y, Yarkony DR. Floquet-Engineered Photodissociation Simulated Using Coupled Potential Energy and Dipole Matrices. J Phys Chem Lett 2024:9905-9911. [PMID: 39303099 DOI: 10.1021/acs.jpclett.4c02312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
We simulate the nonadiabatic molecular dynamics of ammonia photodissociation in the presence of an external laser field by using an approximate Floquet Hamiltonian. The dipole-field interaction gives rise to seams of light-induced conical intersection (LICI), which can significantly change the topography of the coupled potential energy surfaces. We perform quasiclassical trajectories based on recently reported diabatic potential energy matrices (DPEM) and dipole matrices. It is shown that the branching ratio of ground and excited state NH2 is drastically altered by laser-dipole interaction, which is a signature of nonadiabatic effects induced by light.
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Affiliation(s)
- Chris Avanessian
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Yuchen Wang
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David R Yarkony
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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Fábri C, Császár AG, Halász GJ, Cederbaum LS, Vibók Á. Coupling polyatomic molecules to lossy nanocavities: Lindblad vs Schrödinger description. J Chem Phys 2024; 160:214308. [PMID: 38836455 DOI: 10.1063/5.0205048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 05/20/2024] [Indexed: 06/06/2024] Open
Abstract
The use of cavities to impact molecular structure and dynamics has become popular. As cavities, in particular plasmonic nanocavities, are lossy and the lifetime of their modes can be very short, their lossy nature must be incorporated into the calculations. The Lindblad master equation is commonly considered an appropriate tool to describe this lossy nature. This approach requires the dynamics of the density operator and is thus substantially more costly than approaches employing the Schrödinger equation for the quantum wave function when several or many nuclear degrees of freedom are involved. In this work, we compare numerically the Lindblad and Schrödinger descriptions discussed in the literature for a molecular example where the cavity is pumped by a laser. The laser and cavity properties are varied over a range of parameters. It is found that the Schrödinger description adequately describes the dynamics of the polaritons and emission signal as long as the laser intensity is moderate and the pump time is not much longer than the lifetime of the cavity mode. Otherwise, it is demonstrated that the Schrödinger description gradually fails. We also show that the failure of the Schrödinger description can often be remedied by renormalizing the wave function at every step of time propagation. The results are discussed and analyzed.
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Affiliation(s)
- Csaba Fábri
- HUN-REN-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary
- Department of Theoretical Physics, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Attila G Császár
- HUN-REN-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary
- Laboratory of Molecular Structure and Dynamics, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
| | - Gábor J Halász
- Department of Information Technology, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Ágnes Vibók
- Department of Theoretical Physics, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics tér 13, H-6720 Szeged, Hungary
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Fábri C, Halász GJ, Cederbaum LS, Vibók Á. Impact of Cavity on Molecular Ionization Spectra. J Phys Chem Lett 2024; 15:4655-4661. [PMID: 38647546 DOI: 10.1021/acs.jpclett.4c00247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Ionization phenomena have been widely studied for decades. With the advent of cavity technology, the question arises how quantum light affects molecular ionization. As the ionization spectrum is recorded from the neutral ground state, it is usually possible to choose cavities which exert negligible effect on the neutral ground state, but have significant impact on the ion and the ionization spectrum. Particularly interesting are cases where the ion exhibits conical intersections between close-lying electronic states, which gives rise to substantial nonadiabatic effects. Assuming single-molecule strong coupling, we demonstrate that vibrational modes irrelevant in the absence of a cavity play a decisive role when the molecule is in the cavity. Here, dynamical symmetry breaking is responsible for the ion-cavity coupling and high symmetry enables control of the coupling via molecular orientation relative to the cavity field polarization. Significant impact on the spectrum by the cavity is found and shown to even substantially increase for less symmetric molecules.
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Affiliation(s)
- Csaba Fábri
- HUN-REN-ELTE Complex Chemical Systems Research Group, H-1518 Budapest 112, Hungary
- Department of Theoretical Physics, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Gábor J Halász
- Department of Information Technology, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Ágnes Vibók
- Department of Theoretical Physics, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
- ELI-ALPS, ELI-HU Non-Profit Ltd, Dugonics tér 13, H-6720 Szeged, Hungary
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Fábri C, Halász GJ, Vibók Á. Probing Light-Induced Conical Intersections by Monitoring Multidimensional Polaritonic Surfaces. J Phys Chem Lett 2022; 13:1172-1179. [PMID: 35084197 DOI: 10.1021/acs.jpclett.1c03465] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The interaction of a molecule with the quantized electromagnetic field of a nanocavity gives rise to light-induced conical intersections between polaritonic potential energy surfaces. We demonstrate for a realistic model of a polyatomic molecule that the time-resolved ultrafast radiative emission of the cavity enables following both nuclear wavepacket dynamics on, and nonadiabatic population transfer between, polaritonic surfaces without applying a probe pulse. The latter provides an unambiguous (and in principle experimentally accessible) dynamical fingerprint of light-induced conical intersections.
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Affiliation(s)
- Csaba Fábri
- MTA-ELTE Complex Chemical Systems Research Group, P.O. Box 32, Budapest 112, H-1518, Hungary
- Department of Theoretical Physics, University of Debrecen, P.O. Box 400, Debrecen, H-4002, Hungary
| | - Gábor J Halász
- Department of Information Technology, University of Debrecen, P.O. Box 400, Debrecen, H-4002, Hungary
| | - Ágnes Vibók
- Department of Theoretical Physics, University of Debrecen, P.O. Box 400, Debrecen, H-4002, Hungary
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics tér 13, Szeged, H-6720, Hungary
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Yuen-Zhou J, Xiong W, Shegai T. Polariton chemistry: Molecules in cavities and plasmonic media. J Chem Phys 2022; 156:030401. [DOI: 10.1063/5.0080134] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- Joel Yuen-Zhou
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA
| | - Wei Xiong
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA
| | - Timur Shegai
- Department of Physics, Chalmers University of Technology, Gothenburg 41296, Sweden
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Fábri C, Halász GJ, Cederbaum LS, Vibók Á. Radiative emission of polaritons controlled by light-induced geometric phase. Chem Commun (Camb) 2022; 58:12612-12615. [DOI: 10.1039/d2cc04222c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polaritons – hybrid light-matter states formed in cavity – strongly change the properties of the underlying matter.
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Affiliation(s)
- Csaba Fábri
- MTA-ELTE Complex Chemical Systems Research Group, P.O. Box 32, H-1518 Budapest 112, Hungary
- Department of Theoretical Physics, University of Debrecen, PO Box 400, H-4002 Debrecen, Hungary
| | - Gábor J. Halász
- Department of Information Technology, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Lorenz S. Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Ágnes Vibók
- Department of Theoretical Physics, University of Debrecen, PO Box 400, H-4002 Debrecen, Hungary
- ELI-ALPS, ELI-HU Non-Profit Limited, Wolfgang Sandner utca 3, H-6728 Szeged, Hungary
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Merritt ICD, Jacquemin D, Vacher M. Attochemistry: Is Controlling Electrons the Future of Photochemistry? J Phys Chem Lett 2021; 12:8404-8415. [PMID: 34436903 DOI: 10.1021/acs.jpclett.1c02016] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Controlling matter with light has always been a great challenge, leading to the ever-expanding field of photochemistry. In addition, since the first generation of light pulses of attosecond (1 as = 10-18 s) duration, a great deal of effort has been devoted to observing and controlling electrons on their intrinsic time scale. Because of their short duration, attosecond pulses have a large spectral bandwidth populating several electronically excited states in a coherent manner, i.e., an electronic wavepacket. Because of interference, such a wavepacket has a new electronic distribution implying a potentially different and totally new reactivity as compared to traditional photochemistry, leading to the novel concept of "attochemistry". This nascent field requires the support of theory right from the start. In this Perspective, we discuss the opportunities offered by attochemistry, the related challenges, and the current and future state-of-the-art developments in theoretical chemistry needed to model it accurately.
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Affiliation(s)
| | - Denis Jacquemin
- Université de Nantes, CNRS, CEISAM, UMR 6230, F-44000 Nantes, France
| | - Morgane Vacher
- Université de Nantes, CNRS, CEISAM, UMR 6230, F-44000 Nantes, France
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