Ultrafast Transient Spectroscopy of Trans -Polyacetylene in the Midinfrared Spectral Range
نویسندگان
چکیده
منابع مشابه
Asynchronous midinfrared ultrafast optical parametric oscillator for dual-comb spectroscopy.
Two asynchronous, broadband 3.3 µm pulse trains with a stabilized repetition-rate difference of up to 5 kHz were generated using an ultrafast optical parametric oscillator. The two oscillation channels, each producing ~100 mW average power, ran essentially independently, and weak non-phase-matched sum-frequency mixing between them provided a timing signal that indicated when the asynchronous pu...
متن کاملUltrafast spectroscopy of midinfrared internal exciton transitions in separated single-walled carbon nanotubes.
We report a femtosecond midinfrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorption is observed around 200 meV, whose transition energy, oscillator strength, resonant chirality enhancement, and dynamics manifest the observation of quasi-one-dimensional intraexcitonic transitions. A model of the n...
متن کاملElectronic coherence dynamics in trans-polyacetylene oligomers.
Electronic coherence dynamics in trans-polyacetylene oligomers are considered by explicitly computing the time dependent molecular polarization from the coupled dynamics of electronic and vibrational degrees of freedom in a mean-field mixed quantum-classical approximation. The oligomers are described by the Su-Schrieffer-Heeger Hamiltonian and the effect of decoherence is incorporated by propag...
متن کاملSpectral modulation observed in Chl-a by ultrafast laser spectroscopy.
Broadband real-time dynamic vibronic coupling in Chl-a were experimentally studied using few cycle laser pulses of 6.8fs duration and a 128-channnel lock-in amplifier. Thanks to the extreme temporal resolution benefitting from the ultrashort laser pulse, the real-time modulation of the electronic transition energy induced by the molecular vibrations were calculated by the time dependent first m...
متن کاملTransient two-dimensional infrared spectroscopy – towards measuring ultrafast structural dynamics
Ultrafast two-dimensional infrared spectroscopy (2D-IR) is a promising tool for the investigation of molecular structures [1-3] and their equilibrium fluctuations [2, 4]. Similar to 2D-NMR spectroscopy [5], cross-peaks between coupled states emerge in 2D-IR spectra, and contain structural information [2, 6]. The outstanding feature of 2D-IR spectroscopy is the combination of its structure resol...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2020
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.124.017401