Abstract
We observed the directional enhancement of photoluminescence (PL) for nonresonant excitation from cavity polaritons in the distributed feedback (DFB) waveguide microcavities when a cavity standing wave mode is resonant to an exciton. The cavities consist of a quartz grating substrate with ∼700 nm pitch, a (C6H5C2H4NH3) 2PbI4 film with large exciton oscillator strength, and a polystyrene film. They are regarded as a new type of one-dimensional photonic crystals consisting of resonant dispersive materials which couple strongly to modes in the crystals. On the other hand, a dye-dispersed film on the grating does not exhibit such an enhancement, which demonstrates that the polariton effect is essential. We point out for periodic structures in the strong coupling regime that a macroscopic polarization formed under a resonant condition may-exhibit ultrafast radiative decay.
Original language | English |
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Pages (from-to) | 2918-2921 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 68 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1999 Sep |
Externally published | Yes |
Keywords
- Band-edge effect
- Cavity polariton
- Distributed feedback microcavity
- Macroscopic polarization
- Photonic crystal
- Waveguide
ASJC Scopus subject areas
- Physics and Astronomy(all)