Recent development in the design of organic materials for optical power limiting

Spangler, Charles W.

doi:10.1039/a902802a

Cited by 521 publications

(414 citation statements)

References 26 publications

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“…Moreover, TPA is induced at a frequency of half the actual energy gap which stretches the accessible range of conventional lasers (longer wavelengths at 700-1300 nm) and ensures deep penetration depth into an absorbing medium. These distinct properties enable a large variety of TPA applications 14,15 such as fabrication of optoelectronic logical circuits, 16 high-resolution fluorescence microscopy and characterization, [17][18][19][20][21] three-dimensional optical data storage, 22-25 optical power limiting, 26,27 upconversion lasing, 28,29 nondestructive imaging of biological tissues, [30][31][32][33][34] photodynamic therapy, [35][36][37] and new nanobiophotonics applications. 38,39 In particular, photodynamic therapy is a relatively new approach for targeted cellular apoptosis in biological tissues, with current applications in the treatment of tumors, cancers, blood purification and blindness.…”

Section: Introductionmentioning

confidence: 99%

Role of Donor−Acceptor Strengths and Separation on the Two-Photon Absorption Response of Cytotoxic Dyes: A TD-DFT Study

Badaeva

Timofeeva²,

Masunov³

et al. 2005

J. Phys. Chem. A

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Time-dependent density functional theory (TD-DFT) is applied to model one-photon (OPA) and two-photon (TPA) absorption spectra in a series of conjugated cytotoxic dyes. Good agreement with available experimental data is found for calculated excitation energies and cross sections. Calculations show that both OPA and TPA spectra in the molecules studied are typically dominated by two strong peaks corresponding to different electronic states. We find that donor-acceptor strengths and conjugated bridge length have a strong impact on the cross-section magnitudes of low-and high-frequency TPA maxima, respectively. These trends are analyzed in terms of the natural transition orbitals of the corresponding electronic states. Observed structureproperty relationships may have useful implications on design of organic conjugated chromophores with tunable two-photon absorption properties for photodynamic therapy applications.

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Section: Introductionmentioning

confidence: 99%

Role of Donor−Acceptor Strengths and Separation on the Two-Photon Absorption Response of Cytotoxic Dyes: A TD-DFT Study

Badaeva

Timofeeva²,

Masunov³

et al. 2005

J. Phys. Chem. A

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“…Enhancement of nonlinear absorption is of great interest due to the important roles played by nonlinear absorbers in photonic applications such as optical switching, noise suppression and sensor protection [1][2][3][4][5][6][7][8][9][10]. Molecular engineering of chromophores has been one of the major pathways that has been exploited to achieve stronger nonlinear absorption [1,9,[11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Near IR nonlinear absorption of an organic supermolecule [Invited]

Chi¹,

Rosenberg²,

Nayak³

et al. 2011

Opt. Mater. Express

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DescriptionThe photophysics of bis(terpyridyl)osmium-(porphinato)zinc-bis(terpyridyl)osmium (OsPZnOs), a D-π-A-π-D symmetric supermolecule, were investigated in the femtosecond and nanosecond regimes. The supermolecule exhibits a two-photon absorption (δ peak~9 00 GM) in the near IR (900-1300 nm) and optical pumping by two-photon absorption leads to a broad excited state absorption (σ peak~1 .1 × 10 −16 cm 2 ) in the same near IR region. Since the excited state has a long lifetime, OsPZnOs exhibits a strong nanosecond nonlinear absorption in this region. That nonlinear absorption is substantially enhanced when OsPZnOs is incorporated into a multimode waveguide. When two-photon pumping is the dominant mechanism, an additional enhancement of up to ~100 × in the nonlinear absorption is observed in a microchannel waveguide. OsPZnOs is a promising material for photonic applications such as optical noise suppression and optical limiting in the near IR. Disciplines Physical Sciences and Mathematics | Physics Comments ©2011 Optical Society of AmericaThis paper was published in Optics Materials Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/ 10.1364/OME.1.001383. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. RightsTerms of use for work posted in CommonKnowledge. AuthorsSan-Hui Chi, Armand Rosenberg, Animesh Nayak, Timothy V. Duncan, Michael J. Therien, James J. were investigated in the femtosecond and nanosecond regimes. The supermolecule exhibits a two-photon absorption (δ peak ~900 GM) in the near IR (900-1300 nm) and optical pumping by two-photon absorption leads to a broad excited state absorption (σ peak ~1.1 × 10 −16 cm 2 ) in the same near IR region. Since the excited state has a long lifetime, OsPZnOs exhibits a strong nanosecond nonlinear absorption in this region. That nonlinear absorption is substantially enhanced when OsPZnOs is incorporated into a multimode waveguide. When two-photon pumping is the dominant mechanism, an additional enhancement of up to ~100 × in the nonlinear absorption is observed in a microchannel waveguide. OsPZnOs is a promising material for photonic applications such as optical noise suppression and optical limiting in the near IR.

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“…These applications can, for instance, take advantage of two-photon absorption/emission and third harmonic generation properties of the materials [7][8][9]. Our interest in this area involves nonlinear absorption as a means for protection of eyes and various types of sensors in optical equipment from laser beams operating at wavelengths in the visible region [6,[10][11][12]. A primary requirement of the material is fast switching from high transparency for normal light (or low laser power)…”

Section: Introductionmentioning

confidence: 99%

A theoretical and experimental study of non-linear absorption properties of substituted 2,5-di-(phenylethynyl)thiophenes and structurally related compounds

et al. 2009

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Recent development in the design of organic materials for optical power limiting

Cited by 521 publications

References 26 publications

Role of Donor−Acceptor Strengths and Separation on the Two-Photon Absorption Response of Cytotoxic Dyes: A TD-DFT Study

Role of Donor−Acceptor Strengths and Separation on the Two-Photon Absorption Response of Cytotoxic Dyes: A TD-DFT Study

Near IR nonlinear absorption of an organic supermolecule [Invited]

A theoretical and experimental study of non-linear absorption properties of substituted 2,5-di-(phenylethynyl)thiophenes and structurally related compounds

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