Linear and nonlinear optical properties of pseudoisocyanine J aggregates in distributed feedback microcavities

The linear and nonlinear optical properties of pseudoisocyanine (PIC) J aggregates in 1-D distributed feedback (DFB) microcavities, photonic crystal slabs are investigated. The linear optical properties are well described by the DFB cavity-polaritons in the slabs. A polariton mode splitting of 50 me...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2002-07, Vol.38 (7), p.943-948
Main Authors: Sasaki, F., Haraichi, S., Kobayashi, S.
Format: Article
Language:English
Subjects:
Aggregates
Distributed feedback devices
Excitation
Feedback
Integrated optics
Low energy
Microcavities
Nonlinear optics
Nonlinearity
Optical feedback
Optical properties
Optical pumping
Resonance
Slabs
Ultrafast optics
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Summary:The linear and nonlinear optical properties of pseudoisocyanine (PIC) J aggregates in 1-D distributed feedback (DFB) microcavities, photonic crystal slabs are investigated. The linear optical properties are well described by the DFB cavity-polaritons in the slabs. A polariton mode splitting of 50 meV and a photonic band gap of 30 meV are observed in PIC J aggregates dispersed in a polyvinyl-alcohol matrix. In the pump and probe experiments, we resonantly excited the cavity mode observed at the low energy side of the excitonic resonance, the virtual-exciton excitation condition. The response time is about 0.5 ps, which is approximately equal to the pump-pulse duration. We find the enhancement of the optical nonlinearity to be one-order of magnitude in the microcavity. Excitation of the dielectric-band mode is effective in enhancing the nonlinearity with an ultrafast response.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2002.1017612