Cascaded free-induction decay four-wave mixing
Apstrakt
We report the observation of cascaded optical free-induction decay four-wave mixing (FID-FWM) signal. This process can take place when nonlinear optical measurements are carried out with pulses that are orders of magnitude shorter than the dephasing time of the sample. Experimental observations and theoretical calculations show that the coherent emission from the first laser pulse participates as a time-delayed local electric field to yield the cascaded signal. We arrive at this conclusion based on pulse sequences of degenerate noncollinear femtosecond pulses for which three-pulse FWM is forbidden. Further confirmation was obtained from experiments where the time delay between two pulses were used to form ground or excited state populations, the signal reflected the corresponding ground or excited state dynamics. Although FID is long lived, the femtosecond resolution was found to be maintained in our measurements on gas phase molecular iodine. This is because the FID is modulated in th...e femtosecond time scale by the molecular dynamics of the system; its intensity and modulation were confirmed using femtosecond time-gated upconversion measurements. (C) 2001 Elsevier Science B.V. All rights reserved.
Izvor:
Chemical Physics, 2001, 266, 2-3, 205-212Napomena:
- Symposium on Multidimensional Spectroscopies held at the APS Meeting, Mar, 2000, Minneapolis, MN
DOI: 10.1016/S0301-0104(01)00229-4
ISSN: 0301-0104
WoS: 000168685000006
Scopus: 2-s2.0-0035873150
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Lozovoy, VV AU - Pastirk, Igor AU - Comstock, MG AU - Dantus, M PY - 2001 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6317 AB - We report the observation of cascaded optical free-induction decay four-wave mixing (FID-FWM) signal. This process can take place when nonlinear optical measurements are carried out with pulses that are orders of magnitude shorter than the dephasing time of the sample. Experimental observations and theoretical calculations show that the coherent emission from the first laser pulse participates as a time-delayed local electric field to yield the cascaded signal. We arrive at this conclusion based on pulse sequences of degenerate noncollinear femtosecond pulses for which three-pulse FWM is forbidden. Further confirmation was obtained from experiments where the time delay between two pulses were used to form ground or excited state populations, the signal reflected the corresponding ground or excited state dynamics. Although FID is long lived, the femtosecond resolution was found to be maintained in our measurements on gas phase molecular iodine. This is because the FID is modulated in the femtosecond time scale by the molecular dynamics of the system; its intensity and modulation were confirmed using femtosecond time-gated upconversion measurements. (C) 2001 Elsevier Science B.V. All rights reserved. T2 - Chemical Physics T1 - Cascaded free-induction decay four-wave mixing VL - 266 IS - 2-3 SP - 205 EP - 212 DO - 10.1016/S0301-0104(01)00229-4 ER -
@article{ author = "Lozovoy, VV and Pastirk, Igor and Comstock, MG and Dantus, M", year = "2001", abstract = "We report the observation of cascaded optical free-induction decay four-wave mixing (FID-FWM) signal. This process can take place when nonlinear optical measurements are carried out with pulses that are orders of magnitude shorter than the dephasing time of the sample. Experimental observations and theoretical calculations show that the coherent emission from the first laser pulse participates as a time-delayed local electric field to yield the cascaded signal. We arrive at this conclusion based on pulse sequences of degenerate noncollinear femtosecond pulses for which three-pulse FWM is forbidden. Further confirmation was obtained from experiments where the time delay between two pulses were used to form ground or excited state populations, the signal reflected the corresponding ground or excited state dynamics. Although FID is long lived, the femtosecond resolution was found to be maintained in our measurements on gas phase molecular iodine. This is because the FID is modulated in the femtosecond time scale by the molecular dynamics of the system; its intensity and modulation were confirmed using femtosecond time-gated upconversion measurements. (C) 2001 Elsevier Science B.V. All rights reserved.", journal = "Chemical Physics", title = "Cascaded free-induction decay four-wave mixing", volume = "266", number = "2-3", pages = "205-212", doi = "10.1016/S0301-0104(01)00229-4" }
Lozovoy, V., Pastirk, I., Comstock, M.,& Dantus, M.. (2001). Cascaded free-induction decay four-wave mixing. in Chemical Physics, 266(2-3), 205-212. https://doi.org/10.1016/S0301-0104(01)00229-4
Lozovoy V, Pastirk I, Comstock M, Dantus M. Cascaded free-induction decay four-wave mixing. in Chemical Physics. 2001;266(2-3):205-212. doi:10.1016/S0301-0104(01)00229-4 .
Lozovoy, VV, Pastirk, Igor, Comstock, MG, Dantus, M, "Cascaded free-induction decay four-wave mixing" in Chemical Physics, 266, no. 2-3 (2001):205-212, https://doi.org/10.1016/S0301-0104(01)00229-4 . .