Excited-state absorption cross-section of C60

Nansheng Tang, H. Guan, Jouni P. Partanen, Robert W. Hellwarth

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

2 Sitaatiot (Scopus)

Abstrakti

We use a pump-probe technique to measure the change in optical transmission through a 1 cm C 60/benzene (0.58 g/l) solution caused by a 532 nm 25 ps `pump' pulse having fluence up to approximately 10 mJ/cm2. Temporal dependence indicates that transmission drops within the pump pulse width and stays at the reduced level up to our maximum delay time (approximately 10 ns). If we use the standard three-level model for the C60 molecule we deduce that either the excited- singlet-to-triplet crossing happens faster than our pulse width or the two states have indistinguishable absorption cross-sections (σS ≈ σT) at our laser wavelength. We believe that the latter assumption is more probable, and interpret our data by a simple two-cross-section (σ O, σT) model. We find that the difference σT - σO is (3.5 ± 0.2) × 10-17 cm2. We measure the ground state absorption cross-section σ O to be (3.5 ± 0.3) × 10-18 cm2 in an independent experiment.
AlkuperäiskieliEnglanti
Sivut272-280
Sivumäärä9
JulkaisuSPIE CONFERENCE PROCEEDINGS
Vuosikerta2143
DOI - pysyväislinkit
TilaJulkaistu - 15 toukokuuta 1994
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Sormenjälki

Sukella tutkimusaiheisiin 'Excited-state absorption cross-section of C60'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

Siteeraa tätä