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Qiu Hong Cui, Lan Peng, Zhidong Lou, Yufeng Hu and Feng Teng
Beijing JiaoTong University, China
Posters & Accepted Abstracts: Organic Chem Curr Res
The electro-optic modulation, with feasibility of low voltage control between microscopic electrodes, is a crucial route to manipulate the flow of light in nanophotonic circuits. Moreover, the versatile and facile operation brought by monolithic integration of electronics and optics will promote the multiple applications of electrically driven optical elements in the largescale integrated photonic circuits. In most of these electro-optic systems, excitons are utilized as intermediate media to place the electronic operations on photons, because the electric field can distorts the exciton wave function and modifies the photonexciton interaction. In this regard, efficient interaction between exciton and electric field is in great demand in designing and realizing optimizing functional electro-optic modulators. Owing to the large intermolecular interactions in the organic nanocavities, the molecular excitation can be delocalized to the adjacent molecule units, bringing big electron cloud and therefore large electric field induced polarization. Moreover, frenkel type excitons in organic semiconductors possess a high binding energy (on the order of eV) and have strong coupling strength with photons, promoting the photon manipulation through the implementation of electric operations on the excitons. Herein, nanowire of organic Ï�?-conjugated compound 9,10-bis(phenylethynyl)anthr-acene (BPEA) was adopted due to its efficient excitonic coupling, high emission efficiency and low optical loss. Electro-optic modulators has been achieved and the light out-coupling intensity is tuned by applying electric field. This modulation is based on the electric effects on excitons, which enables to realize fast electro-optic switch under a nanosecond electric pulse generator.