Results 261 to 270 of about 931,327 (325)

Bright Near-Infrared Aggregation-Induced Emission Luminogens with Strong Two-Photon Absorption, Excellent Organelle Specificity, and Efficient Photodynamic Therapy Potential.

ACS Nano, 2018
Far-red and near-infrared (NIR) fluorescent materials possessing the characteristics of strong two-photon absorption and aggregation-induced emission (AIE) as well as specific targeting capability are much-sought-after for bioimaging and therapeutic ...
Zheng Zheng, Tianfu Zhang, Haixiang Liu, Yuncong Chen, R. K. Kwok, Chao Ma, Pengfei Zhang, H. Sung, Ian D. Williams, J. Lam, K. Wong, B. Tang   +11 more
semanticscholar   +1 more source

Two-photon absorption in liquid xenon

Physical Review B, 1993
Excitation spectra of two-photon excited xenon near the triple point have been obtained in order to study exciton structure near the band edge. While the band gap is suppressed in the low-temperature liquid, absorption due to even-parity exciton states is presented and discussed.
, Whitehead, , Pournasr, , Keto
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Two-photon absorption in semiconductor nanocrystals

Physical Review B, 1994
Measurements of the two-photon absorption coefficient in semiconductor-doped glasses were performed. The imaginary part of the third-order optical susceptibility in the semiconductor particles is derived by combining nonlinear-optical-transmission data with small-angle neutron-scattering (SANS) results, which give the volume fraction of the ...
BANFI, GIAN PIERO, DEGIORGIO, VITTORIO, TOMASELLI, ALESSANDRA, M. GHIGLIAZZA, H. M. TAN   +4 more
openaire   +2 more sources

Visualization of Photoinduced Charge Transfer and Electron–Hole Coherence in Two-Photon Absorption

Journal of Physical Chemistry C, 2019
We provide a visualization method to observe the photoinduced charge transfer and electron–hole coherence in the two-photon absorption (TPA), especially including the optical properties in the “hidden” intermediate states in TPA.
Xijiao Mu, Jingang Wang, Mengtao Sun
semanticscholar   +1 more source

Two-photon absorption and photoluminescence of colloidal gold nanoparticles and nanoclusters.

Chemical Society Reviews, 2019
This review provides a comprehensive description of nonlinear optical (NLO) properties of gold nanoparticles, which can be used in biological applications.
J. Olesiak‐Bańska, Magdalena Waszkielewicz, Patryk Obstarczyk, M. Samoć   +3 more
semanticscholar   +1 more source

Solitons and two-photon absorption

Optics Letters, 1990
The effect of weak two-photon absorption on soliton propagation is investigated. It is found that fundamental solitons evolve adiabatically; expressions describing their broadening and attenuation are given. Higher-order solitons break up into two diverging fundamental solitons for a wide range of parameters.
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TWO-PHOTON ABSORPTION AND EMISSION PROCESS

Infinite Dimensional Analysis, Quantum Probability and Related Topics, 2005
We analyze the two-photon absorption and emission process and characterize the stationary states at zero and positive temperature. We show that entangled stationary states exist only at zero temperature and, at positive temperature, there exists infinitely many commuting invariant states satisfying the detailed balance condition.
FAGNOLA, FRANCO, R. Quezada
openaire   +2 more sources

Two-photon absorption in HgCdTe

Applied Optics, 1992
Two-photon absorption coefficients in Hg0.78Cd0.22Te are calculated for 10.6-μm radiation at 150 and 300 K by using the Basov formula and the nonparabolic energy band structure approximation. The temperature and composition dependence of the energy gap of HgCdTe are included in these calculations.
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Two‐Photon Absorption of Bismuth Germanate

physica status solidi (b), 1989
AbstractTwo‐photon absorption of BGO is observed between 4.8 and 5.7 eV. The results confirm and extend previous investigations on two‐photon excited luminescence. In particular the two‐photon spectra do not show the first three structures observed in the reflectivity measurements.
CASALBONI, MAURO, FRANCINI, ROBERTO, Lohmeier, FJ, GRASSANO, UMBERTO MARIA   +3 more
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Two-photon absorption strength: A new tool for the quantification of two-photon absorption

The Journal of Chemical Physics, 2006
In this paper, we define the two-photon absorption strength, a new characterization tool, similar to the oscillator strength, but for two-photon absorption. It allows the quantification of the two-photon absorption properties of molecular systems which are one-photon transparent. Its definition is such that the corresponding numerical values are around
Fortrie, Rémy, Chermette, Henry
openaire   +2 more sources