Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1675139 | Thin Solid Films | 2006 | 4 Pages |
Abstract
The third-order optical nonlinearity of the J-aggregates of nonionic dye in vapor-deposited films has been investigated in terms of electroabsorption measurement. Compared with that of a monomer film of the dye, the nonlinearity was enhanced by a factor of 4000. However, the number of aggregates in the J-aggregate film was estimated to be only a few. The obtained enhancement is mainly caused by the concentration of oscillator strength on the J-band and not by the development of the coherence size of excitons. Therefore, a much larger optical nonlinearity can be expected in highly ordered J-aggregates of the nonionic dye, and it is demonstrated that J-aggregate formation is an effective strategy for nonionic dye to improve its optical nonlinearity.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Takashi Kobayashi, Shinya Matsumoto, Tetsuya Aoyama, Tatsuo Wada,