Title :
Linear and nonlinear optical properties of pseudoisocyanine J aggregates in distributed feedback microcavities
Author :
Sasaki, Fumio ; Haraichi, Satoshi ; Kobayashi, Shunsuke
Author_Institution :
Photonics Res. Inst., Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki, Japan
fDate :
7/1/2002 12:00:00 AM
Abstract :
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
Keywords :
aggregation; dyes; excitons; filled polymers; light transmission; nonlinear optics; optical resonators; optical switches; organic semiconductors; photonic band gap; polaritons; visible spectra; 0.5 ps; 1-D distributed feedback microcavities; DFB cavity-polaritons; cavity mode; dielectric-band mode; excitonic resonance; linear optical properties; nonlinear optical properties; optical nonlinearity; photonic band gap; photonic crystal slabs; polariton mode splitting; polyvinyl-alcohol matrix; probe experiments; pseudoisocyanine J aggregates; pump experiments; pump-pulse duration; response time; ultrafast response; virtual-exciton excitation condition; Aggregates; Distributed feedback devices; Integrated optics; Microcavities; Nonlinear optics; Optical feedback; Optical pumping; Resonance; Slabs; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2002.1017612
