Nonlinear measurements on AF-50

Fleitz, Paul A.; Brant, Mark C.; Sutherland, Richard L.; Strohkendl, F. P.; Larsen, R. J.; Dalton, Larry R.

doi:10.1117/12.326876

Cited by 42 publications

(14 citation statements)

References 8 publications

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“…One of the most well-studied chromophores of this new generation is ( N , N -diphenyl-7-[2-(4-pyridinyl)ethenyl]-9,9-didecylfluoren-2-amine), abbreviated AF50. − AF50 typifies a class of asymmetric donor−acceptor heterocyclic chromophores consisting of π-electron-donating and π-electron-accepting heterocyclic moieties separated by a conjugated aromatic core. When measured with nanosecond (ns) laser pulses, AF50 displays an effective two-photon cross-section value of up to 19 400 × 10 -50 cm 4 s photon -1 .…”

Section: Introductionmentioning

confidence: 99%

Molecular Environment Effects on Two-Photon-Absorbing Heterocyclic Chromophores

et al. 1999

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Over the past several years, organic molecules exhibiting significant two-photon absorbance and subsequent up-converted fluorescence have been of intense interest for a wide variety of applications including data storage, imaging, and optical limiting. However, the establishment of structure-property relationships for some asymmetric molecules has been hindered by the sensitivity of these nonlinear optical properties to the local molecular environment and to the pulse width of the incident radiation. To understand the influence of the local molecular environment on the excited states of these two-photon-absorbing molecules, the linear absorbance, the single-photon-excited photoluminescence, and the two-photon-excited photoluminescence of a series of heterocyclic dyes are examined. The stabilization of the longest-lived one-photon-excited state by the local molecular environment can be described by mean field interactions with solvent molecules as given by the Lippert equation. Because the same stabilization dominates the two-photon-induced longest-lived excited state, the influence of the local molecular environment on the two-photon luminescence can be predicted using the Lippert equation and one-photon experiments. These results support models that suggest excited-state absorption is the primary cause of sensitivity of the "effective" twophoton cross-section to the pulse-width and the local molecular environment.

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Section: Introductionmentioning

confidence: 99%

Molecular Environment Effects on Two-Photon-Absorbing Heterocyclic Chromophores

et al. 1999

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“…In addition, TPA materials often have an upconverted fluorescence emission associated with the nonlinear absorption. These characteristics are useful in such applications as microfabrication [7][8][9] , data storage 10 , frequency upconverted lasing [11][12][13][14][15] , fluorescence imaging 16 , photodynamic therapy 17 , and nonlinear photonics [18][19][20] . In addition to using fluorescence in applications such as imaging and sensing, it is also used as a characterization tool.…”

Section: Introductionmentioning

confidence: 98%

Background host effects on the nonlinear photophysical properties of a two-photon absorbing dye

et al. 2005

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Organic materials exhibiting strong two-photon absorption cross-sections and subsequent up-converted fluorescence have been targeted for use in a variety of applications including optical data storage, nondestructive imaging, frequency up-converted lasing, and microfabrication. In order for these materials to be useful in practical application they must either be coupled with a liquid solvent or doped into a solid host material. The purpose of this study is to examine effects of different host environments on the nonlinear photophysical properties of AF-455, a recently developed organic two-photon absorber. We present results of experiments using both emission and absorption methods to characterize the linear and nonlinear response of AF-455 dissolved in solvents of varying polarity and doped in a polymer (PMMA) matrix.

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“…Two-photon absorption (TPA) is a third-order nonlinear absorption process involving the simultaneous absorption of two either degenerate or nondegenerate photons. TPA has various applications, such as three-dimensional (3D) optical data storage [1,2], 3D optical imaging for biological systems [3,4], 3D microfabrication and early corrosion detection [5,6], optical power limiting [7], and photodynamic therapy [8]. In recent years, researchers have paid great attention to the development of TPA materials for use in the life sciences.…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigation of the two-photon absorption properties of 3,6-bis(4-vinylpyridinium) carbazole derivatives—new biological fluorescent probes

et al. 2011

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The present study focuses on a series of carbazole derivatives, which are being investigated as potential two-photon fluorescent probes (TFP) for DNA detection and two-photon bioimaging. The geometric structures, electronic structures, and the one-photon (OPA) and two-photon (TPA) absorption properties of 3,6-bis(1-methyl-4-vinylpyridinium) carbazole (BMVC) derivatives, as well as their dications and diiodized derivatives, were studied using density functional theory (DFT) and Zerner's intermediate neglect of differential overlap (ZINDO) method. The results showed that the TPA spectra of the diiodized BMVC derivatives and their dications are all found in the near-infrared region (NIR). At the same time, the diiodized BMVC derivatives presented larger TPA cross-sections than the neutral BMVC derivatives and the dications. These theoretically derived values were also in good agreement with their corresponding experimentally observed values, and they indicated that the diiodized BMVC may be the form of this TFP that combines with DNA. The diiodized BMVC derivatives and the dications have the potential to be excellent TPA materials, especially when used as TFPs in nucleic acid imaging applications.

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Nonlinear measurements on AF-50

Cited by 42 publications

References 8 publications

Molecular Environment Effects on Two-Photon-Absorbing Heterocyclic Chromophores

Molecular Environment Effects on Two-Photon-Absorbing Heterocyclic Chromophores

Background host effects on the nonlinear photophysical properties of a two-photon absorbing dye

Theoretical investigation of the two-photon absorption properties of 3,6-bis(4-vinylpyridinium) carbazole derivatives—new biological fluorescent probes

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