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15 March 2023 Along for the ride: the influence of dark states in organic polariton transport
Raj Pandya, Arjun Ashoka, Kyriacos Georgiou, Scott Renken, Rahul Jayaprakash, Akshay Rao, Andrew J. Musser
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Proceedings Volume PC12419, Ultrafast Phenomena and Nanophotonics XXVII; (2023) https://doi.org/10.1117/12.2649379
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
The hybrid light-matter character of exciton-polaritons enables strikingly long-range energy transport in organic materials. We use femtosecond transient absorption microscopy to probe this behavior in the initial coherent regime, where photon and exciton wavefunctions are inextricably mixed. We achieve rapid polaritonic transport in highly ordered, pure organic semiconductor films without any external cavity. In a disordered system, confinement within a Fabry-Perot cavity provides enables comparable coherent transport effects. In both cases, the polaritons don’t travel alone: they are accompanied by intracavity dark states, which reduce the transport velocity, extend the lifetime, and provide a new mechanism for external control.
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Raj Pandya, Arjun Ashoka, Kyriacos Georgiou, Scott Renken, Rahul Jayaprakash, Akshay Rao, and Andrew J. Musser "Along for the ride: the influence of dark states in organic polariton transport", Proc. SPIE PC12419, Ultrafast Phenomena and Nanophotonics XXVII, (15 March 2023); https://doi.org/10.1117/12.2649379
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KEYWORDS
Polaritons
Femtosecond phenomena
Light wave propagation
Microscopy
Optical microcavities
Organic materials
Organic semiconductors
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