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Ultrafast polariton dynamics in strongly coupled zinc porphyrin microcavities at room temperature

Ultrafast polariton dynamics in strongly coupled zinc porphyrin microcavities at room temperature
Ultrafast polariton dynamics in strongly coupled zinc porphyrin microcavities at room temperature
Time and angle-resolved measurements reveal ultrafast dynamics of excitations in organic microcavities leading to dramatic modulation of probe transmission (~30%). We find that the induced changes have both fast and long-lived components. Fast response times are defined by vibronic relaxation and intersystem crossing (S1 ? T1), whereas long-lived changes are attributed to a build up of carriers in the nonradiative triplet state whose lifetime is longer than the repetition rate of the laser pulses, resulting thus in incomplete recovery of the ground state. Blueshifts of the lower polariton branch in the presence of the pump pulse indicate the presence of nonlinear interactions in the sample. However, there is no evidence yet for the pair-type scattering processes in porphyrin microcavities.
microcavities, organic strong-coupling physics, optoelectronics
1550-235X
113312-[3pp]
Savvidis, P.G.
94ddd90f-ba89-4a68-85ca-5581f33105de
Connolly, L.G.
e21b3804-243b-420e-b96d-968e8e076782
Skolnick, M.S.
f3155840-dc44-4f68-8329-a139a585cc6a
Lidzey, D.G.
5d7d3f80-7bec-4d49-ac6c-8746d604f672
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Savvidis, P.G.
94ddd90f-ba89-4a68-85ca-5581f33105de
Connolly, L.G.
e21b3804-243b-420e-b96d-968e8e076782
Skolnick, M.S.
f3155840-dc44-4f68-8329-a139a585cc6a
Lidzey, D.G.
5d7d3f80-7bec-4d49-ac6c-8746d604f672
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07

Savvidis, P.G., Connolly, L.G., Skolnick, M.S., Lidzey, D.G. and Baumberg, J.J. (2006) Ultrafast polariton dynamics in strongly coupled zinc porphyrin microcavities at room temperature. Physical Review B, 74 (11), 113312-[3pp]. (doi:10.1103/PhysRevB.74.113312).

Record type: Article

Abstract

Time and angle-resolved measurements reveal ultrafast dynamics of excitations in organic microcavities leading to dramatic modulation of probe transmission (~30%). We find that the induced changes have both fast and long-lived components. Fast response times are defined by vibronic relaxation and intersystem crossing (S1 ? T1), whereas long-lived changes are attributed to a build up of carriers in the nonradiative triplet state whose lifetime is longer than the repetition rate of the laser pulses, resulting thus in incomplete recovery of the ground state. Blueshifts of the lower polariton branch in the presence of the pump pulse indicate the presence of nonlinear interactions in the sample. However, there is no evidence yet for the pair-type scattering processes in porphyrin microcavities.

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Published date: 27 September 2006
Keywords: microcavities, organic strong-coupling physics, optoelectronics

Identifiers

Local EPrints ID: 42039
URI: http://eprints.soton.ac.uk/id/eprint/42039
ISSN: 1550-235X
PURE UUID: 0169a1fe-3eb5-4e1e-9b8f-221cdea0b828

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Date deposited: 09 Nov 2006
Last modified: 11 Nov 2019 19:27

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