Sequences for controlling laser excitation with femtosecond three-pulse four-wave mixing
Апстракт
Three-pulse four-wave mixing (FWM) is used here to study and control laser excitation processes. For general laser excitation processes, after a molecule interacts resonantly with a laser pulse, the molecule has a probability of being in the ground or in the excited state. Control over this process depends on the phase and amplitude of the electric fields that interact with the molecular system. Here we show how three-pulse FWM can be used to control the excitation of iodine molecules. Depending on the time delay between the first two pulses, the observed signal reflects the dynamics of the ground or excited state. A theoretical formalism based on the density matrix formulation is presented and solved for a four-level system. Experiments are found to be in excellent agreement with the theory. The influence of linear chirp on three-pulse FWM experiments is explored. Spectrally dispersed three-pulse FWM is found to be extremely useful for studying the effect of chirp on laser excitation ...of molecular systems. Experimental demonstrations of these effects are included.
Извор:
Faraday Discussions, 1999, 113, 401-424
DOI: 10.1039/a902571e
ISSN: 0301-7249
WoS: 000083334200023
Scopus: 2-s2.0-2742554060
Колекције
Институција/група
VinčaTY - JOUR AU - Pastirk, Igor AU - Brown, EJ AU - Grimberg, BI AU - Lozovoy, VV AU - Dantus, M PY - 1999 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2286 AB - Three-pulse four-wave mixing (FWM) is used here to study and control laser excitation processes. For general laser excitation processes, after a molecule interacts resonantly with a laser pulse, the molecule has a probability of being in the ground or in the excited state. Control over this process depends on the phase and amplitude of the electric fields that interact with the molecular system. Here we show how three-pulse FWM can be used to control the excitation of iodine molecules. Depending on the time delay between the first two pulses, the observed signal reflects the dynamics of the ground or excited state. A theoretical formalism based on the density matrix formulation is presented and solved for a four-level system. Experiments are found to be in excellent agreement with the theory. The influence of linear chirp on three-pulse FWM experiments is explored. Spectrally dispersed three-pulse FWM is found to be extremely useful for studying the effect of chirp on laser excitation of molecular systems. Experimental demonstrations of these effects are included. T2 - Faraday Discussions T1 - Sequences for controlling laser excitation with femtosecond three-pulse four-wave mixing VL - 113 SP - 401 EP - 424 DO - 10.1039/a902571e ER -
@article{ author = "Pastirk, Igor and Brown, EJ and Grimberg, BI and Lozovoy, VV and Dantus, M", year = "1999", abstract = "Three-pulse four-wave mixing (FWM) is used here to study and control laser excitation processes. For general laser excitation processes, after a molecule interacts resonantly with a laser pulse, the molecule has a probability of being in the ground or in the excited state. Control over this process depends on the phase and amplitude of the electric fields that interact with the molecular system. Here we show how three-pulse FWM can be used to control the excitation of iodine molecules. Depending on the time delay between the first two pulses, the observed signal reflects the dynamics of the ground or excited state. A theoretical formalism based on the density matrix formulation is presented and solved for a four-level system. Experiments are found to be in excellent agreement with the theory. The influence of linear chirp on three-pulse FWM experiments is explored. Spectrally dispersed three-pulse FWM is found to be extremely useful for studying the effect of chirp on laser excitation of molecular systems. Experimental demonstrations of these effects are included.", journal = "Faraday Discussions", title = "Sequences for controlling laser excitation with femtosecond three-pulse four-wave mixing", volume = "113", pages = "401-424", doi = "10.1039/a902571e" }
Pastirk, I., Brown, E., Grimberg, B., Lozovoy, V.,& Dantus, M.. (1999). Sequences for controlling laser excitation with femtosecond three-pulse four-wave mixing. in Faraday Discussions, 113, 401-424. https://doi.org/10.1039/a902571e
Pastirk I, Brown E, Grimberg B, Lozovoy V, Dantus M. Sequences for controlling laser excitation with femtosecond three-pulse four-wave mixing. in Faraday Discussions. 1999;113:401-424. doi:10.1039/a902571e .
Pastirk, Igor, Brown, EJ, Grimberg, BI, Lozovoy, VV, Dantus, M, "Sequences for controlling laser excitation with femtosecond three-pulse four-wave mixing" in Faraday Discussions, 113 (1999):401-424, https://doi.org/10.1039/a902571e . .