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30 September 2024 Advances in organic polariton lasers
Mengjie Wei, Hamid Ohadi, Graham A. Turnbull, Ifor D. W. Samuel
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Proceedings Volume PC13127, Physical Chemistry of Semiconductor Materials and Interfaces XXIII; PC131270L (2024) https://doi.org/10.1117/12.3028517
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States
Abstract
Organic semiconductors are an attractive class of semiconductor combining simple fabrication with the scope to tune properties by changing the structure. Their high oscillator strength and exciton binding energy make them attractive candidates for strong light-matter coupling, and polariton lasers operating at room temperature have been demonstrated. Many of these lasers operate at high thresholds (>100 uJ/cm2). We have explored fluorene oligomers and polymers as a route to much lower thresholds. We demonstrate low-threshold (<20 µJ/cm2) polariton lasing in a range of fluorene-based materials. Building on these results we have explored 1D and 2D lattices of polariton condensates. In the 2D case we observe a polariton condensate 2-3 µm from the pump spots, showing that polaritons can travel much further than excitons in organic semiconductors.
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Mengjie Wei, Hamid Ohadi, Graham A. Turnbull, and Ifor D. W. Samuel "Advances in organic polariton lasers", Proc. SPIE PC13127, Physical Chemistry of Semiconductor Materials and Interfaces XXIII, PC131270L (30 September 2024); https://doi.org/10.1117/12.3028517
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KEYWORDS
Polaritons
Excitons
Organic semiconductors
Fabrication
Laser damage threshold
Materials properties
Oscillators
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