TY - JOUR
T1 - Dual beam transient thermal lens spectroscopy with high repetition pulsed IR-Laser Excitation
T2 - Photothermal and fluorescence quantum yields determination
AU - Vargas-Vargas, A. D.
AU - Mejorada-Sánchez, J. L.
AU - Castellanos-Durán, F. R.
AU - Vargas, E.
AU - Isidro-Ojeda, M. A.
AU - Cedeño, E.
AU - Rojas-Trigos, J. B.
AU - Calderón, A.
AU - Marín, E.
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/3
Y1 - 2023/3
N2 - Based on experimental results, we demonstrated that the most widely used model for the description of the dual beam transient thermal lens spectroscopy technique also works well when a high repetition frequency pulsed pump laser is used instead of a commonly employed continuous wave source. For this, for water samples colored with a tartrazine dye, we compared the optical absorbance obtained using a continuous and a pulsed laser source emitting at the same excitation wavelength. A close to 90 % photothermal quantum yield was obtained as a function of the dye concentration. As an application, we measured the near-infrared fluorescence quantum yield spectrum of a CF®800 dye (Biotium) dissolved in water. The thermal lens signal was recorded as a function of the photon's wavelength using a tunable MAI TAI BB laser oscillator (Spectra Physics) for pumping that generates light pulses of about 80 fs at a repetition frequency of 80 MHz between 710 and 980 nm. The quantum yield spectrum and a comparison of the optical absorbance spectra measured by the thermal lens technique and a conventional transmittance experiment show a significant fluorescence quenching due to water optical absorption.
AB - Based on experimental results, we demonstrated that the most widely used model for the description of the dual beam transient thermal lens spectroscopy technique also works well when a high repetition frequency pulsed pump laser is used instead of a commonly employed continuous wave source. For this, for water samples colored with a tartrazine dye, we compared the optical absorbance obtained using a continuous and a pulsed laser source emitting at the same excitation wavelength. A close to 90 % photothermal quantum yield was obtained as a function of the dye concentration. As an application, we measured the near-infrared fluorescence quantum yield spectrum of a CF®800 dye (Biotium) dissolved in water. The thermal lens signal was recorded as a function of the photon's wavelength using a tunable MAI TAI BB laser oscillator (Spectra Physics) for pumping that generates light pulses of about 80 fs at a repetition frequency of 80 MHz between 710 and 980 nm. The quantum yield spectrum and a comparison of the optical absorbance spectra measured by the thermal lens technique and a conventional transmittance experiment show a significant fluorescence quenching due to water optical absorption.
KW - Femtoseconds
KW - Fluorescence
KW - Laser
KW - Quantum yield
KW - Spectroscopy
KW - Thermal lens
UR - http://www.scopus.com/inward/record.url?scp=85146593930&partnerID=8YFLogxK
U2 - 10.1016/j.infrared.2023.104561
DO - 10.1016/j.infrared.2023.104561
M3 - Artículo
AN - SCOPUS:85146593930
SN - 1350-4495
VL - 129
JO - Infrared Physics and Technology
JF - Infrared Physics and Technology
M1 - 104561
ER -