Directionally enhanced photoluminescence from distributed feedback cavity polaritons

被引:11
作者
Fujita, T
Ishihara, T
机构
[1] Hiroshima Univ, Fac Engn, Dept Educ Phys, Higashihiroshima 7398527, Japan
[2] Japan Sci & Technol Corp, CREST, Higashihiroshima 7398527, Japan
关键词
cavity polariton; distributed feedback microcavity; waveguide; photonic crystal; band-edge effect; macroscopic polarization;
D O I
10.1143/JPSJ.68.2918
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 similar to 700 nm pitch, a (C6H5C2H4NH3)(2)PbI4 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.
引用
收藏
页码:2918 / 2921
页数:4
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