Microcavity-like exciton-polaritons can be the primary photoexcitation in bare organic semiconductors

Raj Pandya, Richard Y. S. Chen, Qifei Gu, Jooyoung Sung, Christoph Schnedermann, Oluwafemi S. Ojambati, Rohit Chikkaraddy, Jeffrey Gorman, Gianni Jacucci, Olimpia D. Onelli, Tom Willhammar, Duncan N. Johnstone, Sean M. Collins, Paul A. Midgley, Florian Auras, Tomi Baikie, Rahul Jayaprakash, Fabrice Mathevet, Richard Soucek, Matthew Du, Antonios M. Alvertis, Arjun Ashoka, Silvia Vignolini, David G. Lidzey, Jeremy J. Baumberg, Richard H. Friend, Thierry Barisien, Laurent Legrand, Alex W. Chin, Joel Yuen-Zhou, Semion K. Saikin, Philipp Kukura, Andrew J. Musser and Akshay Rao ()
Additional contact information
Raj Pandya: University of Cambridge, J.J. Thomson Avenue
Richard Y. S. Chen: University of Cambridge, J.J. Thomson Avenue
Qifei Gu: University of Cambridge, J.J. Thomson Avenue
Jooyoung Sung: University of Cambridge, J.J. Thomson Avenue
Christoph Schnedermann: University of Cambridge, J.J. Thomson Avenue
Oluwafemi S. Ojambati: University of Cambridge, J.J. Thomson Avenue
Rohit Chikkaraddy: University of Cambridge, J.J. Thomson Avenue
Jeffrey Gorman: University of Cambridge, J.J. Thomson Avenue
Gianni Jacucci: University of Cambridge, Lensfield Road
Olimpia D. Onelli: University of Cambridge, Lensfield Road
Tom Willhammar: Stockholm University
Duncan N. Johnstone: University of Cambridge
Sean M. Collins: University of Cambridge
Paul A. Midgley: University of Cambridge
Florian Auras: University of Cambridge, J.J. Thomson Avenue
Tomi Baikie: University of Cambridge, J.J. Thomson Avenue
Rahul Jayaprakash: University of Sheffield
Fabrice Mathevet: Institut Parisien de Chimie Moléculaire (IPCM), Sorbonne Université
Richard Soucek: Sorbonne Université
Matthew Du: University of California San Diego
Antonios M. Alvertis: University of Cambridge, J.J. Thomson Avenue
Arjun Ashoka: University of Cambridge, J.J. Thomson Avenue
Silvia Vignolini: University of Cambridge, Lensfield Road
David G. Lidzey: University of Sheffield
Jeremy J. Baumberg: University of Cambridge, J.J. Thomson Avenue
Richard H. Friend: University of Cambridge, J.J. Thomson Avenue
Thierry Barisien: Sorbonne Université
Laurent Legrand: Sorbonne Université
Alex W. Chin: Sorbonne Université
Joel Yuen-Zhou: University of California San Diego
Semion K. Saikin: Harvard University
Philipp Kukura: University of Oxford
Andrew J. Musser: Cornell University, Baker Laboratory
Akshay Rao: University of Cambridge, J.J. Thomson Avenue

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract Strong-coupling between excitons and confined photonic modes can lead to the formation of new quasi-particles termed exciton-polaritons which can display a range of interesting properties such as super-fluidity, ultrafast transport and Bose-Einstein condensation. Strong-coupling typically occurs when an excitonic material is confided in a dielectric or plasmonic microcavity. Here, we show polaritons can form at room temperature in a range of chemically diverse, organic semiconductor thin films, despite the absence of an external cavity. We find evidence of strong light-matter coupling via angle-dependent peak splittings in the reflectivity spectra of the materials and emission from collective polariton states. We additionally show exciton-polaritons are the primary photoexcitation in these organic materials by directly imaging their ultrafast (5 × 106 m s−1), ultralong (~270 nm) transport. These results open-up new fundamental physics and could enable a new generation of organic optoelectronic and light harvesting devices based on cavity-free exciton-polaritons

Date: 2021
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Citations: View citations in EconPapers (3)

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DOI: 10.1038/s41467-021-26617-w

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