scholarly journals Single-photon pumping and two-photon probing spectroscopy for the determination of absorption cross-sections in an organic semiconductor

2005 ◽  
Vol 13 (26) ◽  
pp. 10873 ◽  
Author(s):  
Xinping Zhang ◽  
Yajun Xia ◽  
Richard H. Friend
Keyword(s):  
Cross Sections ◽  
Organic Semiconductor ◽  
Single Photon ◽  
Absorption Cross ◽  
Two Photon

Determination of Two-Photon Absorption Cross-Sections in Selected Diketo-Pyrrolo-Pyrroles

2019 ◽  
Vol 955 ◽  
pp. 37-43
Author(s):  
Martin Vala ◽  
Matouš Kratochvíl ◽  
Patricie Heinrichova ◽  
Martin Weiter
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Strong Fluorescence ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

The paper deals with determination of two-photon absorption cross-sections of selected representatives of diketo-pyrrolo-pyrrole. The materials were optimized in order to test the influence of various substitutions on the diketo-pyrrolo-pyrrole basic molecule. The two-photon absorption cross-sections were determined using two-photon excited fluorescence technique. A considerably high two-photon absorption cross-section in order of 1000 GM was found for non-symmetrically substituted derivative with donor-acceptor structure. All of the derivatives showed strong fluorescence in solid state visible by naked eye. These results demonstrate that this class of materials can be used in e.g. two-photon fluorescence microscopy in the form of nanoparticles.

Determination of two-photon absorption cross sections of photosensitizers and its implications for two-photon polymerization

2014 ◽  
Vol 54 (1) ◽  
pp. 132 ◽  
Author(s):  
Bibi Safia Haq ◽  
Hidayat Ullah Khan ◽  
Khan Alam ◽  
Muhammad Ajmal ◽  
Shehnaz Attaullah ◽  
...  
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Two Photon Polymerization

Determination of absolute two-photon excitation cross sections by in situ second-order autocorrelation

1995 ◽  
Vol 20 (23) ◽  
pp. 2372 ◽  
Author(s):  
Chris Xu ◽  
Winfried Denk ◽  
Jeffrey Guild ◽  
Watt W. Webb
Keyword(s):  
Cross Sections ◽  
Second Order ◽  
Two Photon ◽  
Photon Excitation ◽  
Excitation Cross Sections ◽  
Two Photon Excitation

scholarly journals Determination of the absorption cross-sections of higher order iodine oxides at 355 nm and 532 nm

2020 ◽  
Author(s):  
Thomas R. Lewis ◽  
Juan Carlos Gómez Martin ◽  
Mark A. Blitz ◽  
Carlos A. Cuevas ◽  
John M. C. Plane ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Atmospheric Chemistry ◽  
Absorption Cross Section ◽  
Absorption Cross ◽  
Time Resolved ◽  
Flight Mass Spectrometry ◽  
Iodine Oxides ◽  
Photo Ionization

Abstract. Iodine oxides (IxOy) play an important role in the atmospheric chemistry of iodine. They are initiators of new particle formation events in the coastal and polar boundary layer and act as iodine reservoirs in tropospheric ozone-depleting chemical cycles. Despite the importance of the aforementioned processes, the photochemistry of these molecules has not been studied in detail previously. Here, we report the first determination of the absorption cross sections of IxOy, x = 2, 3, 5, y = 1–12 at λ = 355 nm by combining pulsed laser photolysis of I2/O3 gas mixtures in air with time-resolved photo-ionization time-of-flight mass spectrometry, using NO2 actinometry for signal calibration. The oxides selected for absorption cross section determinations are those presenting the strongest signals in the mass spectra, where signals containing 4 iodine atoms are absent. The method is validated by measuring the absorption cross section of IO at 355 nm, σ355 nm, IO = (1.2 ± 0.1) ×  10–18 cm2, which is found to be in good agreement with the most recent literature. The results obtained are: σ355 nm, I2O3 

Novel 2,1,3-Benzothiadiazole-Based Red-Fluorescent Dyes with Enhanced Two-Photon Absorption Cross-Sections

2006 ◽  
Vol 12 (8) ◽  
pp. 2303-2317 ◽  
Author(s):  
Shin-ichiro Kato ◽  
Taisuke Matsumoto ◽  
Motoyuki Shigeiwa ◽  
Hideki Gorohmaru ◽  
Shuuichi Maeda ◽  
...  
Keyword(s):  
Cross Sections ◽  
Fluorescent Dyes ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon
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