Time-resolved and cw photoluminescence from strongly coupled organic microcavities
| Autor: | David G. Lidzey, Vadim G. Lyssenko, Karl Leo, Torsten Fritz, Michael J. Hoffmann, Hartmut Fröb, L. G. Connolly, M. Koschorreck, R. Schüppel, Robert Gehlhaar, J. Wenus |
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| Rok vydání: | 2004 |
| Předmět: |
Photoluminescence
business.industry Chemistry Exciton Biophysics Physics::Optics General Chemistry Condensed Matter Physics Polarization (waves) Distributed Bragg reflector Biochemistry Molecular physics Optical microcavity Atomic and Molecular Physics and Optics law.invention law Polariton Optoelectronics Emission spectrum business Excitation |
| Zdroj: | Journal of Luminescence. 110:354-358 |
| ISSN: | 0022-2313 |
| Popis: | The optical properties of microcavities (MCs) are strongly dependent on both polarization of incident and emitted light and its angle of observation. Here we report the measurements of cw- and time-resolved photoluminescence (PL) observed at negative detuning and at resonance for s- and p-polarization in the strong coupling regime of a planar MC containing J-aggregates of a cyanine dye. Following non-resonant excitation, the emission spectra consist of three types of features: direct J-aggregate exciton emission, polariton emission, and uncoupled monomer emission through the transmission maxima of the distributed Bragg reflector beyond the stop-band. We compare our experimental results with a transfer-matrix calculation of the transmission for s- and p-polarization and explain the different positions of the polariton branches, the stop-band width, and the high- and low energy transmission maxima of the MC. Time-resolved PL experiments show an increase in the decay lifetime of the exciton-like mode when it is positioned far from the cavity mode. Close to resonance, the lower polariton branch decays with the natural lifetime of the J-aggregates. |
| Databáze: | OpenAIRE |
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