| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.47 |
| 발표분야 | 분자전자 소재의 현황과 전망 |
| 제목 | Molecular Engineering of Organic Electro-Optic Materials for Applications in Optical Modulators |
| 초록 | Rapid developments in the telecommunications field are pressing the need for improved photonic components. Recently we have observed a significant progress in the development of nonlinear optical (NLO) organic and polymeric materials, which have shown great promise for telecommunication devices. These materials offer several superior properties such as large electro-optic coefficient, fast response time, small dispersion of the refractive index from dc to optical frequencies, and processability. Optical modulators based on the NLO polymers successfully have been demonstrated with drive voltage below 1V as well as bandwidth over 150 GHz.1 Since the first electric field poled NLO polymers were reported in 1982, most efforts have focused on developing new NLO chromophores having high molecular hyperpolarizability and dipole moment. However, structure modeling and experimental results suggested that intermolecular electrostatic interaction between NLO molecules prevented efficient aligning of the chromophores at high chromophore concentration.2-3 Preventing the antiparallel interaction of the chromophores at the molecular level was highly required to achieve an efficient poling and hence high macroscopic NLO activity. The recent results have shown that introducing a bulky side chains into the molecules was a successful approach to achieve chromophore separation and hence to minimize intermolecular interaction of the chromophores. In the similar context, the NLO chromophores were incorporated into a dendritic structure. The dendritic architecture was very effective in site isolation of the chromophores, hence reducing the antiparallel packing of the chromophores.4-5 With this approach there are several dendritic chromophores reported to have much higher macroscopic electro-optic activity than the linear chromophores. In this talk, a recent research trend in the worldwide and recent results in our group in the development of molecular engineering of organic electro-optic materials for optical modulators will be presented. References 1. M. Lee, H.E. Katz, C. Erben, D.M. Gill, P. Gopalan, J.D. Heber, and D.J. McgGee, Science, 298, 1401 (2002). 2. Y. Shi, C. Zhang, H. Zhang, J.H. Bechtel, L.R. Dalton, B.H. Robinson, and W.H. Steier, Science, 288, 119 (2002). 3. Dalton, L.R. J.Phys.: Condens. Matter, R897, 15 (2003). 4. H. Ma and A.K.-Y. Jen, Adv. Mater., 13, 1201 (2001). 5. Y.V. Pereverzev, O.V. Prezhdo, and L.R. Dalton, Chem. Phys. Lett., 373, 207 (2003). |
| 저자 | 김동욱1, 박응제1, 윤은영1, 김한수1, 진문영1, 김경만1, 박승구2, 도정윤2, 이창진1 |
| 소속 | 1한국화학(연), 2한국전자통신(연) |
| 키워드 | Organic Electro-Optical Materials; Optical Modulator; Dendritic Chromophores |
