Fluorescence anisotropy in indole under two-photon excitation in the spectral range 385–510 nm

2018 ◽  
Vol 20 (30) ◽  
pp. 19922-19931 ◽  
Author(s):  
M. E. Sasin ◽  
A. G. Smolin ◽  
K.-H. Gericke ◽  
E. Tokunaga ◽  
O. S. Vasyutinskii
Keyword(s):  
Propylene Glycol ◽  
Excited States ◽  
Spectral Range ◽  
Ground State ◽  
Fluorescence Anisotropy ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Excitation ◽  
Molecular Ground State

This paper presents the detailed study of two-photon excited fluorescence in indole dissolved in propylene glycol produced by two-photon absorption from the molecular ground state to several high lying excited states.

Two-photon absorption spectra of a near-infrared 2-azaazulene polymethine dye: solvation and ground-state symmetry breaking

2013 ◽  
Vol 15 (20) ◽  
pp. 7666 ◽  
Author(s):  
Honghua Hu ◽  
Olga V. Przhonska ◽  
Francesca Terenziani ◽  
Anna Painelli ◽  
Dmitry Fishman ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Absorption Spectra ◽  
Ground State ◽  
Near Infrared ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Polymethine Dye

Two-photon excitation spectroscopy of photosynthetic light-harvesting complexes and pigments

2019 ◽  
Vol 216 ◽  
pp. 494-506 ◽  
Author(s):  
Alexander Betke ◽  
Heiko Lokstein
Keyword(s):  
Spectral Region ◽  
Protein Complexes ◽  
Photosynthetic Pigment ◽  
Photon Absorption ◽  
Light Harvesting Complexes ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Excitation ◽  
Pigment Protein Complexes ◽  
Two Photon Excitation

Two-photon excitation (TPE) profiles of LHCII samples containing different xanthophyll complements were measured in the presumed 11Ag− → 21Ag− (S0 → S1) transition region of xanthophylls. Additionally, TPE profiles of Chls a and b in solution and of WSCP, which does not contain carotenoids, were measured. The results indicate that direct two-photon absorption by Chls in the presumed S0 → S1 transition spectral region of carotenoids is dominant over that of carotenoids, with negligible contributions of the latter. These results suggest the re-evaluation of previously published TPE data obtained with photosynthetic pigment–protein complexes containing (B)Chls and carotenoids.

Ultrafast pump-probe and time-resolved fluorescence anisotropy study of the intramolecular interaction of branched styryl derivatives based on 1,3,5-triazine

2019 ◽  
Vol 28 (01) ◽  
pp. 1950003 ◽  
Author(s):  
Yaochuan Wang ◽  
Yizhuo Wang ◽  
Guiqiu Wang ◽  
Dajun Liu
Keyword(s):  
Fluorescence Anisotropy ◽  
Intramolecular Interaction ◽  
Intramolecular Interactions ◽  
Photon Absorption ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Property Measurement

A series of branched styryl derivatives based on 1,3,5-triazine were studied by nonlinear optical property measurement, degenerated pump-probe, and time-resolved fluorescence anisotropy methods to elucidate the two-photon absorption (TPA) properties and intramolecular interactions between branches. Significant enhancement of the TPA cross-section was observed in multi-branched derivatives. The anisotropy of multi-branched compounds shows faster decay and small residual values, indicating strong intramolecular interactions between branches, which further confirmed the TPA enhancement mechanism.

scholarly journals Protecting and accelerating adiabatic passage with time-delayed pulse sequences

2016 ◽  
Vol 18 (19) ◽  
pp. 13443-13448 ◽  
Author(s):  
Pablo Sampedro ◽  
Bo Y. Chang ◽  
Ignacio R. Sola
Keyword(s):  
Wave Packet ◽  
Computer Simulations ◽  
Ground State ◽  
Pulse Sequences ◽  
Photon Absorption ◽  
Rabi Oscillations ◽  
Adiabatic Passage ◽  
Two Photon Absorption ◽  
State Time ◽  
Two Photon

We study non-resonant two-photon absorption in the B band of Na2 with femtosecond pulses. The computer simulations show attenuated Rabi oscillations using coincident pulses that can be overcome by initially preparing a wave packet in the ground state. Time-delayed pulse sequences intrinsically protect the adiabatic passage of population, but the process can be accelerated starting with the packet.

Excited States and Two-Photon Absorption of Some Novel Thiophenyl Pt(II)−Ethynyl Derivatives

2007 ◽  
Vol 111 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Eirik Glimsdal ◽  
Marcus Carlsson ◽  
Bertil Eliasson ◽  
Boris Minaev ◽  
Mikael Lindgren
Keyword(s):  
Excited States ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

Infrared free electron laser measurement of two-photon absorption in InAs and InSb over a wide spectral range

1993 ◽  
Vol 2 (2) ◽  
pp. 89-93 ◽  
Author(s):  
B.N. Murdin ◽  
C.R. Pidgeon ◽  
A.K. Kar ◽  
D.A. Jaroszynski ◽  
J.-M. Ortega ◽  
...  
Keyword(s):  
Spectral Range ◽  
Free Electron ◽  
Free Electron Laser ◽  
Photon Absorption ◽  
Wide Spectral Range ◽  
Laser Measurement ◽  
Two Photon Absorption ◽  
Two Photon
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