Journal
PHYSICAL REVIEW B
Volume 83, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.245309
Keywords
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Funding
- UK EPSRC [EP/G062404/1]
- European Union [237900]
- DFG [RE 2978/1-1]
- EPSRC [EP/G062404/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G062404/1] Funding Source: researchfish
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We study an organic semiconductor microcavity operating in the strong-coupling regime using fs pump-probe spectroscopy. By probing the induced absorption associated with the one-exciton to two-exciton transition, we are able to characterize the time-dependent population densities of states in the upper-and lower-polariton branches following impulsive excitation. We model the time-dependent polariton dynamics and provide direct evidence of a scattering process that returns upper-branch cavity polaritons to states in the exciton reservoir having a rate of (150 fs)(-1). A slower process similarly populates lower-branch polaritons by return scattering from the exciton reservoir.
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