Remarkable two-photon absorption in open-shell singlet systems

Masayoshi Nakano, Kyohei Yoneda, Ryohei Kishi, Hideaki Takahashi, Takashi Kubo, Kenji Kamada, Koji Ohta, Edith Botek, Benoit Champagne

Research output: Contribution to journalArticle

Abstract

Remarkable enhancement of two-photon absorption (TPA) peak is theoretically predicted in symmetric open-shell singlet diradical systems with intermediate diradical character as compared to closed-shell and pure diradical systems. It is revealed that the largest TPA peak intensities occur for open-shell singlet diradicals having a ferromagnetically coupled ground state and strongly depend on the ratio between damping factors of the excited states. This result confirms that open-shell singlet conjugated molecules with intermediate diradical characters have precedence over conventional closed-shell conjugated systems in resonant third-order nonlinear optical properties.

Original languageEnglish
Article number114316
JournalThe journal of chemical physics
Volume131
Issue number11
DOIs
Publication statusPublished - 1 Dec 2009

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Photons
photons
Excited states
Ground state
Optical properties
Damping
damping
optical properties
Molecules
ground state
augmentation
excitation
molecules

Cite this

Nakano, M., Yoneda, K., Kishi, R., Takahashi, H., Kubo, T., Kamada, K., ... Champagne, B. (2009). Remarkable two-photon absorption in open-shell singlet systems. The journal of chemical physics, 131(11), [114316]. https://doi.org/10.1063/1.3225202
Nakano, Masayoshi ; Yoneda, Kyohei ; Kishi, Ryohei ; Takahashi, Hideaki ; Kubo, Takashi ; Kamada, Kenji ; Ohta, Koji ; Botek, Edith ; Champagne, Benoit. / Remarkable two-photon absorption in open-shell singlet systems. In: The journal of chemical physics. 2009 ; Vol. 131, No. 11.
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Nakano, M, Yoneda, K, Kishi, R, Takahashi, H, Kubo, T, Kamada, K, Ohta, K, Botek, E & Champagne, B 2009, 'Remarkable two-photon absorption in open-shell singlet systems', The journal of chemical physics, vol. 131, no. 11, 114316. https://doi.org/10.1063/1.3225202

Remarkable two-photon absorption in open-shell singlet systems. / Nakano, Masayoshi; Yoneda, Kyohei; Kishi, Ryohei; Takahashi, Hideaki; Kubo, Takashi; Kamada, Kenji; Ohta, Koji; Botek, Edith; Champagne, Benoit.

In: The journal of chemical physics, Vol. 131, No. 11, 114316, 01.12.2009.

Research output: Contribution to journalArticle

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AU - Nakano, Masayoshi

AU - Yoneda, Kyohei

AU - Kishi, Ryohei

AU - Takahashi, Hideaki

AU - Kubo, Takashi

AU - Kamada, Kenji

AU - Ohta, Koji

AU - Botek, Edith

AU - Champagne, Benoit

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AB - Remarkable enhancement of two-photon absorption (TPA) peak is theoretically predicted in symmetric open-shell singlet diradical systems with intermediate diradical character as compared to closed-shell and pure diradical systems. It is revealed that the largest TPA peak intensities occur for open-shell singlet diradicals having a ferromagnetically coupled ground state and strongly depend on the ratio between damping factors of the excited states. This result confirms that open-shell singlet conjugated molecules with intermediate diradical characters have precedence over conventional closed-shell conjugated systems in resonant third-order nonlinear optical properties.

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Nakano M, Yoneda K, Kishi R, Takahashi H, Kubo T, Kamada K et al. Remarkable two-photon absorption in open-shell singlet systems. The journal of chemical physics. 2009 Dec 1;131(11). 114316. https://doi.org/10.1063/1.3225202