repository
매우 높은 오프-다이아고날 비선형 광학 특성을 가진 플루오르화 벤조사이아졸리움 기반의 유기 결정
- Author(s)
- 이지아
- Advisor
- 권오필
- Department
- 일반대학원 분자과학기술학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2019-02
- Language
- eng
- Alternative Abstract
- For various application of nonlinear optics, π-conjugated organic materials have to exhibit large macroscopic diagonal and off-diagonal nonlinear optical response in crystalline state. We designed new organic ionic crystals consisting of fluorinated benzothiazolium based PM5FB (5-fluoro-2-(4-(4-(hydroxymethyl)piperidin-1-yl)styryl-3-methylbenzo[d]thiazol-3-ium) cation and various counter anions. We observed that PM5FB based chromophores have high thermal stability and microscopic optical nonlinearity. All of PM5FB based organic crystals have isomorphic series-type crystal structure formed by hydrogen bonding between cation and anion which is similar to previously reported PMB-T (2-(4-(4-(hydroxymethyl)piperidin-1-yl)styryl-3-methylbenzo[d]thiazol-3-ium 4-methylsulfonate) crystal. Surprisingly, it was investigated that PM5FB-CBS (5-fluoro-2-(4-(4-(hydroxymethyl)piperidin-1-yl)styryl-3-methylbenzo[d]thiazol-3-ium 4-chlorobenzenesulfonate) has molecular ordering of 56.7° which is very close to optimal angle for maximizing off-diagonal component. In THz generation experiment, off-diagonal term of PM5FB-CBS crystal shows a 3 times more efficient peak-to-peak THz electric field than diagonal term of standard inorganic ZnTe crystal and reduced dimples in the THz wave spectra which indicate that phonon mode was suppressed.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
-
- License
- STATISTICS
- Total Visit :2,958,593
- Total Download :1,694
- Today View :4,979
