Dr. Ryan M. O'Donnell Profile

Dr. Ryan M. O'Donnell

Chemist at DEVCOM Army Research Lab

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Author

Publications (15)

Proceedings Article | 11 March 2024 Paper

Synergizing supramolecular chemistry and reverse saturable absorption: exploring pillar[5]arene with metal-complexed ligands

Gilbert Kosgei, P.U. Ashvin Iresh Fernando, Harley McAlexander, Emilie Chapple, Ryan O'Donnell

Proceedings Volume 12883, 1288303 (2024) https://doi.org/10.1117/12.3001913

KEYWORDS: Saturable absorption, Metals, Optical properties, Materials properties, Absorption spectrum, Absorption, Electrical properties, Nonlinear optics, Supramolecular assemblies

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Proceedings Article | 11 March 2024 Presentation + Paper

Derivatized phenylbenzothiazole cyclometalating ligands for reverse saturable absorption materials development

Victor Jaffett, Ryan O'Donnell, Thomas Rohrabaugh, Justin Yeung, Chi Nguyen, William Shensky

Proceedings Volume 12883, 1288302 (2024) https://doi.org/10.1117/12.3001916

KEYWORDS: Photoluminescence, Saturable absorption, Chromophores, Transition metals, Time correlated single photon counting, Absorption, Spectroscopy

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Proceedings Article | 14 March 2023 Presentation

Installation of hole transport functionality in iridium complexes for reverse saturable absorption (RSA) materials development

Ryan O'Donnell, Thomas Rohrabaugh, Jack Harrison, Justin Yeung, Victor Jaffett, Chi Nguyen, William Shensky

Proceedings Volume PC12418, PC1241808 (2023) https://doi.org/10.1117/12.2653670

KEYWORDS: Iridium, Saturable absorption, Organic light emitting diodes, Nonlinear optics, Visible radiation, Transition metals, Quantum efficiency, Near infrared, Luminescence, Chromophores

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Proceedings Article | 14 March 2023 Presentation + Paper

Shining light on the photophysics of polymethine dyes with chalcogenopyrylium termini

Lauren Rosch, Matthew Crawley, Thomas Rohrabaugh, Trenton Ensley, Ryan O'Donnell, Timothy Cook

Proceedings Volume 12418, 1241804 (2023) https://doi.org/10.1117/12.2650099

KEYWORDS: Dyes, Oxygen, Electrodes, Absorption, Oxidation, Platinum, Tellurium, Spectroscopy, Femtosecond phenomena, Ultrafast phenomena

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Proceedings Article | 14 March 2023 Presentation + Paper

Triplet migration and reverse-saturable absorption in cyclometalated iridium complexes with pyrene isocyanide ligands

Morris Olumba, Ryan O'Donnell, Thomas Rohrabaugh, Thomas Teets

Proceedings Volume 12418, 1241805 (2023) https://doi.org/10.1117/12.2648467

KEYWORDS: Nonlinear optical materials, Iridium, Absorption, Photoluminescence, Light absorption, Absorption spectrum, Chromophores, Phosphorescence, Visible radiation, Ultraviolet radiation, Energy transfer

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Proceedings Article | 7 March 2022 Presentation + Paper

Derivatized phenylbenzothiazole cyclometalating ligands for reverse saturable absorption materials development

Victor Jaffett, Ryan O'Donnell, Thomas Rohrabaugh, Jack Harrison, Nanki Verma, Chi Nguyen, William Shensky

Proceedings Volume 11998, 1199804 (2022) https://doi.org/10.1117/12.2611252

KEYWORDS: Bromine, Absorption, Microwave radiation, Chromophores, Saturable absorption, Luminescence, Transition metals, Spectroscopy, Pulsed laser operation

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Proceedings Article | 7 March 2022 Presentation + Paper

Rigidification of cyclometalating ligands for reverse saturable absorption (RSA) materials development

Ryan O'Donnell, Thomas Rohrabaugh, Kenneth Smith, William Shensky

Proceedings Volume 11998, 1199805 (2022) https://doi.org/10.1117/12.2611166

KEYWORDS: Absorption, Iridium, Saturable absorption, Nonlinear optics, Visible radiation, Absorption spectroscopy, Spectroscopy, Pulsed laser operation, Transition metals, Ultrafast phenomena

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Proceedings Article | 5 March 2021 Presentation + Paper

Coordination-driven self-assembly of multi-chromophoric architectures using photoactive building blocks

Timothy Cook, Austin Gilbert, Cory Hauke, Ryan O'Donnell

Proceedings Volume 11683, 116830V (2021) https://doi.org/10.1117/12.2577775

KEYWORDS: Molecular self-assembly, Molecular assembly, Molecules, Iridium, Directed self assembly, Chromophores

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Proceedings Article | 5 March 2021 Presentation + Paper

Photophysics and excited-state absorption of bis-cyclometalated iridium complexes with isocyanide ancillary ligands

Morris Olumba, Ryan O'Donnell, Thomas Rohrabaugh, Thomas Teets

Proceedings Volume 11683, 116830S (2021) https://doi.org/10.1117/12.2576139

KEYWORDS: Absorption, Iridium, Spectroscopy, Luminescence, Absorption spectroscopy

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Proceedings Article | 5 March 2021 Presentation + Paper

Derivatized 2-phenylbenzothiazole cyclometalating ligands for reverse saturable absorption (RSA) materials development

Ryan O'Donnell, Thomas Rohrabaugh, Bailey Schieve, Alexis Burnette, Shamya London, William Shensky

Proceedings Volume 11683, 116830T (2021) https://doi.org/10.1117/12.2578752

KEYWORDS: Saturable absorption, Organic light emitting diodes, Nonlinear optics, Absorption, Transition metals, Photodynamic therapy, Microwave radiation, Iridium, Chromophores, Chromatography

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Proceedings Article | 28 February 2020 Presentation + Paper

Characterization of the ultrafast nonlinear response of new organic compounds

David Hagan, Salimeh Tofighi, Sepehr Benis, Hao-Jung Chang, Ryan O'Donnell, Jianmin Shi, Mikhail Bondar, Eric Van Stryland

Proceedings Volume 11277, 112770N (2020) https://doi.org/10.1117/12.2552364

KEYWORDS: Nonlinear optics, Picosecond phenomena, Absorption spectroscopy, Femtosecond phenomena, Nonlinear optical materials, Organic materials

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Proceedings Article | 28 February 2020 Paper

Kinetics of energy transfer and acceptor dimerization in a bichromophore system

Timothy Pritchett, Ryan O'Donnell

Proceedings Volume 11277, 112770P (2020) https://doi.org/10.1117/12.2543042

KEYWORDS: Ruthenium, Energy transfer, Absorption

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Proceedings Article | 5 March 2019 Presentation

Broadband excited-state absorption in metal dithiolene complexes (Conference Presentation)

William Shensky, Ryan O'Donnell, Jianmin Shi, Seungchul Lee, Michael Ferry, Neal Bambha

Proceedings Volume 10915, 109150S (2019) https://doi.org/10.1117/12.2508779

KEYWORDS: Absorption, Metals, Biomimetics, Solar energy, Laser energy, Nonlinear optics, Nickel, Gold, Femtosecond phenomena

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Proceedings Article | 27 February 2019 Presentation + Paper

Iridium complexes containing nitro-derivatized isoquinoline ligands for photonic applications

Ryan O'Donnell, Autumn Moore, Jianmin Shi, Trenton Ensley, Michael Ferry, Neal Bambha, William Shensky

Proceedings Volume 10915, 1091508 (2019) https://doi.org/10.1117/12.2508772

KEYWORDS: Luminescence, Absorption, Iridium, Organic light emitting diodes, Glasses, CIE 1931 color space, Nonlinear optics, Quantum efficiency, Liquids, Single photon

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Proceedings Article | 25 August 2017 Presentation + Paper

Reverse saturable absorption (RSA) in fluorinated iridium derivatives

Michael Ferry, Ryan O'Donnell, Neal Bambha, Trenton Ensley, William Shensky, Jianmin Shi

Proceedings Volume 10360, 1036004 (2017) https://doi.org/10.1117/12.2272715

KEYWORDS: Iridium, Saturable absorption, Nonlinear optics, Organic light emitting diodes, Optical properties, Visible radiation, Absorption spectroscopy, Picosecond phenomena, Nonlinear optical materials, Materials processing

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Showing 5 of 15 publications

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