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Two-Photon Photodynamic Therapy
Journal of Clinical Laser Medicine & Surgery, 1997We demonstrate the use of infrared excitation in conjunction with an efficient two-photon absorbing dye and a photosensitizer in photodynamic therapy.An efficient two-photon absorbing dye is excited by short infrared (800 nm) laser pulses, which transfer its energy to the photosensitizer and the photosensitizer, in turn, generates the singlet oxygen.A ...
J D, Bhawalkar +3 more
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2014
Two-photon (TP) laser scanning microscopy has become an important tool for noninvasive biomedical imaging. TP fluorophore excitation using (near) infrared wavelengths show enhanced tissue penetration and reduced photodamage of biological specimen. This modality allows noninvasive three-dimensional deep-tissue imaging with submicron resolution, which ...
Wu, Zhuojun, van Zandvoort, Marc
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Two-photon (TP) laser scanning microscopy has become an important tool for noninvasive biomedical imaging. TP fluorophore excitation using (near) infrared wavelengths show enhanced tissue penetration and reduced photodamage of biological specimen. This modality allows noninvasive three-dimensional deep-tissue imaging with submicron resolution, which ...
Wu, Zhuojun, van Zandvoort, Marc
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Nuclear Physics B - Proceedings Supplements, 2003
A review of the recent experimental results on two photon physics at LEP is presented. The total cross section for γγ → hadrons is measured for two-photon centre-of-mass energies up to 160 GeV. The QCD predictions are tested with measurements of the total hadronic cross section for virtual γ * γ * collisions, with heavy flavour ( c c ¯
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A review of the recent experimental results on two photon physics at LEP is presented. The total cross section for γγ → hadrons is measured for two-photon centre-of-mass energies up to 160 GeV. The QCD predictions are tested with measurements of the total hadronic cross section for virtual γ * γ * collisions, with heavy flavour ( c c ¯
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Optics Letters, 2013
The Lau effect is an interference phenomenon in which two transmission gratings are located in tandem and illuminated incoherently. Here we report the experimental observation of the quantum Lau effect using a two-photon entangled source. Two experimental schemes are proposed and performed.
De-Qin, Xu +4 more
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The Lau effect is an interference phenomenon in which two transmission gratings are located in tandem and illuminated incoherently. Here we report the experimental observation of the quantum Lau effect using a two-photon entangled source. Two experimental schemes are proposed and performed.
De-Qin, Xu +4 more
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Clinical two‐photon microendoscopy
Microscopy Research and Technique, 2007AbstractTwo‐photon medical imaging has found its way into dermatology as an excellent method for noninvasive skin cancer detection without need of contrast agents as well as for in situ drug screening of topically‐applied cosmetical and pharmaceutical components.
K, König +5 more
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Two-Photon Uncaging Microscopy
Cold Spring Harbor Protocols, 2011INTRODUCTIONTwo-photon uncaging takes advantage of the inherent optical sectioning power of two-photon excitation to generate highly localized concentration increases of neurotransmitters such as glutamate. This can be used to activate isolated clusters of receptors and, thus, produce maps of receptor densities, or activate intracellular signal ...
Masanori, Matsuzaki, Haruo, Kasai
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Cold Spring Harbor Protocols, 2007
INTRODUCTIONChemical two-photon uncaging is useful for a wide range of applications, including both mapping of receptor location and localized photostimulation of neurons via activation of excitatory glutamate receptors. Experimental preparations could include brain slices, cultured neurons, and, among other possibilities, whole brains in vivo.
Diana L, Pettit, George J, Augustine
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INTRODUCTIONChemical two-photon uncaging is useful for a wide range of applications, including both mapping of receptor location and localized photostimulation of neurons via activation of excitatory glutamate receptors. Experimental preparations could include brain slices, cultured neurons, and, among other possibilities, whole brains in vivo.
Diana L, Pettit, George J, Augustine
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2004
Publisher Summary This chapter describes a new cytometry technique based on the combination of Two-photon microscopy (TPM) and high-speed imaging techniques. TPM is a high-resolution fluorescence microscopy technique that provides 3D images of cells and tissues. It is well suited for imaging tissues. By incorporating high-speed image capabilities, it
Timothy, Ragan +3 more
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Publisher Summary This chapter describes a new cytometry technique based on the combination of Two-photon microscopy (TPM) and high-speed imaging techniques. TPM is a high-resolution fluorescence microscopy technique that provides 3D images of cells and tissues. It is well suited for imaging tissues. By incorporating high-speed image capabilities, it
Timothy, Ragan +3 more
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Physical Review A, 1995
Degenerate as well as nondegenerate three-level two-photon laser (TPL) models are derived. In the limit of equal cavity losses for both fields, it is shown that the nondegenerate model reduces to the degenerate one. We also demonstrate the isomorphism existing between our degenerate TPL model and that of a dressed-state TPL. All these models contain ac-
, de Valcárcel GJ +3 more
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Degenerate as well as nondegenerate three-level two-photon laser (TPL) models are derived. In the limit of equal cavity losses for both fields, it is shown that the nondegenerate model reduces to the degenerate one. We also demonstrate the isomorphism existing between our degenerate TPL model and that of a dressed-state TPL. All these models contain ac-
, de Valcárcel GJ +3 more
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Two-Photon Photoelectric Effect
Physical Review, 1962The surface photoelectric current from a pure metal surface is calculated when the frequency of the incident radiation is less than the threshold frequency but greater than one-half the threshold frequency. To do this, second-order stationary perturbation theory is used. The current thus found is normally small.
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