Results 51 to 60 of about 263,956 (158)

Non-Degenerate Two-Photon Absorption of Fluorescent Protein Chromophores

open access: yes, 2023
Two-photon absorption (2PA), where a pair of photons are absorbed simultaneously, is recognized as a potent bioimaging technique, which depends on the quantified 2PA probability, defined as cross-section (σ2PA).
Ismael A., Elayan, Alex, Brown
core   +1 more source

Two-photon microscopy : sequential imaging studies in vivo [PDF]

open access: yes, 2011
Microscopists have always desired to look inside various organ tissues to study structure, function and dysfunction of their cellular constituents. In the past, this has frequently required tissue extraction and histological preparation to gain access ...
Zammit, Christian   +4 more
core  

Width Dependent Two-Photon Absorption in Monolayer Black Phosphorus Nanoribbons

open access: yesApplied Sciences, 2019
Black phosphorus nanoribbons (BPNs) might offer alternatives to narrow-gap compound semiconductors for tunable optoelectronics in infrared region. In this work we present a quantum perturbation theory on two-photon absorption (TPA) in monolayer armchair ...
Yu Liu   +3 more
doaj   +1 more source

Hard x-ray intensity autocorrelation using direct two-photon absorption

open access: yesPhysical Review Research, 2022
An intensity autocorrelation measurement is demonstrated to characterize a pulse duration of 9-keV x-ray free-electron laser (XFEL) pulses from a split-delay optical (SDO) system with four-bounce silicon 220 reflections in each branch.
Taito Osaka   +9 more
doaj   +1 more source

Design and fabrication of highly efficient non-linear optical devices for implementing high-speed optical processing [PDF]

open access: yes, 2002
We present the design and fabrication of micro-cavity semiconductor devices for enhanced Two-Photon-Absorption response, and demonstrate the use of these devices for implementing sensitive autocorrelation measurements on pico-second optical ...
Folliot, H.   +7 more
core  

Two‐Photon Excited Near‐Infrared Phosphorescence Based on Secondary Supramolecular Confinement

open access: yesAdvanced Science, 2022
Organic phosphorescence materials have received wide attention in bioimaging for bio‐low toxicity and large Stokes. Herein, a design strategy to achieve near‐infrared (NIR) excitation and emission of organic room‐temperature phosphorescence through two ...
Xin‐Kun Ma   +4 more
doaj   +1 more source

Two-photon-absorption and upconverted superradiance properties of organic dye HEASPS-doped linear homogeneous polymer at several wavelengths

open access: yes, 2002
The spectral and temporal properties of single- and two-photon fluorescence of a dye-doped linear homogeneous polymer are reported. The dopant is a new organic dye, trans-4-p-(N-hydroxyethyl-N-ethylamino)styryl-N-methylpyridinium p-toluene sulfonate ...
Xiaoquiang Yu (19124389)   +7 more
core   +1 more source

Two- and one-photon absorption spectra of aqueous thiocyanate anion highlight the role of symmetry in condensed phase

open access: yes, 2023
Calculation of the two-photon (2PA) absorption spectrum of aqueous thiocyanate using high-level quantum-chemistry methods is presented. The 2PA spectrum is compared to the 1PA spectrum computed using the same computational protocol.
Anna I., Krylov   +2 more
core   +1 more source

Fluorescent phosphorus dendrimers excited by two photons: synthesis, two-photon absorption properties and biological uses

open access: yesBeilstein Journal of Organic Chemistry, 2019
Different types of two-photon absorbing (TPA) fluorophores have been synthesized and specifically functionalized to be incorporated in the structure of phosphorus dendrimers (highly branched macromolecules).
Anne-Marie Caminade   +9 more
doaj   +1 more source

Synthesis, as well as linear and nonlinear fluorescence properties of 5, 5’-bis(4-N-carbazolylstyryl)-2, 2’-bithiophene [PDF]

open access: yesJournal of the Serbian Chemical Society, 2004
Anew bithiophene-based organic luminescence material, named 5,5’-bis(4-N-carbazoylstyryl)- 2,2’-bithiophene (BCSBT), was synthesized. Its single-photon excited fluorescence band is located in the range of 520–530 nm, with a quantum yield of around 10 ...
Xia Guang-Ming, Lu Ping, Xu Gui-Bao
doaj   +1 more source

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