테라헤르츠파 발생을 위한 고효율 전기광학 퀴놀리니움 단결정
Highly Efficient Electro-Optic Quinolinium Single Crystals for THz Wave Generation
- 주제(키워드) Nonlinear optics , Terahertz wave , Organic crystal , Quinolinium derivatives
- 발행기관 아주대학교
- 지도교수 권오필
- 발행년도 2012
- 학위수여년월 2012. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000012172
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
We designed and synthesized a series of new electro-optic quinolinium crystals with modifying sulfonated anions for THz applications. Compared previously reported HMQ-T (2-(4-hydroxy-3-methoxystyryl)-1-methylquinolinium 4-methylbenzenesulfonate) crystals exhibiting about 3 times higher THz generation efficiency than benchmark polyene crystals, newly designed HMQ-TMS (2-(4-hydroxy-3-methoxystyryl)-1-methylquinolinium 2,4,6-trimethylbenzenesulfonate) crystals possess completely optimal molecular packing for electro-optic applications and exhibit 20% larger nonlinear optical responses. By enhancing solubility with 3.4 times higher than HMQ-T crystals, bulk HMQ-TMS crystals with a size of up to 18 ？e 15 ？e 8 mm3 are easily grown by slow cooling method. While thin thickness with small size of HMQ-T crystals limited the beam path-length and aperture size, respectively for THz wave generation, thick thickness with large size of HMQ-TMS crystals allowed longer beam path-length and larger aperture size. We have demonstrated THz generation with HMQ-TMS crystals by optical rectification using 200 fs pulses at pump wavelength of 836 nm.
more목차
I. Introduction
II. Experiments
II.1 Chemical Structure
II.2 Synthesis
II.2.1 Materials
II.2.2 General Characterization
II.2.3 Synthesis of Materials
II.2.3.1 Synthesis by metathesis
II.2.3.2 Synthesis by condensation (HMQ-TMS)
II.3 Macroscopic and Microscopic Nonlinearities
II.4 Crystal Structure Data for the HMQ-TMS and HMQ-OH Crystal
III. Results and Discussion
III.1 New Acentric HMQ Crystals
III.2 Characterization and single crystal structure
III.3 Molecular and Macroscopic Optical Nonlinearities
III.4 Large Size Bulk Crystals
III.5 High Power THz Wave Generation
IV. Conclusions
V. References
