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Optomagneto control of singlet fission charge multiplication dynamics in single organic semiconductor crystals

https://doi.org/10.1364/CLEO_FS.2023.FF2G.4

Mayonado, Gina; Zhu, Fangyi; Goldthwaite, Winston; Zhu, Liangdong; Anthony, John E.; Ostroverkhova, Oksana; Graham, Matt W. (January 2023, Optica Publishing Group)

Over a 0-7 T range, transient absorption microscopy on anthradithiophene organic crystals shows that singlet to triplet pair state conversion is anticorrelated with fluorescence yield. This shows how the dominant singlet fission charge multiplication pathway can be switched-off with increasing B-field or by changing the molecular packing motifs.
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Searches for Dark Photons at Accelerators

https://doi.org/10.1146/annurev-nucl-110320-051823

Graham, Matt; Hearty, Christopher; Williams, Mike (September 2021, Annual Review of Nuclear and Particle Science)

Dark matter particles may interact with other dark matter particles via a new force mediated by a dark photon, A′, which would be the dark-sector analog to the ordinary photon of electromagnetism. The dark photon can obtain a highly suppressed mixing-induced coupling to the electromagnetic current, providing a portal through which dark photons can interact with ordinary matter. This review focuses on A′ scenarios that are potentially accessible to accelerator-based experiments. We summarize the existing constraints placed by such experiments on dark photons, highlight what could be observed in the near future, and discuss the major experimental challenges that must be overcome to improve sensitivities.
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High-Symmetry Anthradithiophene Molecular Packing Motifs Promote Thermally Activated Singlet Fission

https://doi.org/10.1021/acs.jpcc.1c10977

Mayonado, Gina; Vogt, Kyle T.; Van Schenck, Jonathan D.; Zhu, Liangdong; Fregoso, Garrett; Anthony, John; Ostroverkhova, Oksana; Graham, Matt W. (March 2022, The Journal of Physical Chemistry C)

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Ultrafast Photocurrent and Absorption Microscopy of Few-Layer Transition Metal Dichalcogenide Devices That Isolate Rate-Limiting Dynamics Driving Fast and Efficient Photoresponse

https://doi.org/10.1021/acs.jpcc.0c02646

Vogt, Kyle T.; Shi, Su-Fei; Wang, Feng; Graham, Matt W. (July 2020, The Journal of Physical Chemistry C)
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