Fluorinated organic electro-optic quinolinium crystals for THz wave generation

Kim, Se-In; Kang, Bong Joo; Jeong, Chan-Uk; Shin, Myeong-Hoon; Kim, Won Tae; Jazbinsek, Mojca; Yoon, Woojin; Yun, Hoseop; Kim, Dongwook; Rotermund, Fabian; Kwon, O-Pil

doi:10.1002/adom.201801495

Publication type:	Article in scientific journal
Type of review:	Not specified
Title:	Fluorinated organic electro-optic quinolinium crystals for THz wave generation
Authors:	Kim, Se-In Kang, Bong Joo Jeong, Chan-Uk Shin, Myeong-Hoon Kim, Won Tae Jazbinsek, Mojca Yoon, Woojin Yun, Hoseop Kim, Dongwook Rotermund, Fabian Kwon, O-Pil
DOI:	10.1002/adom.201801495
Published in:	Advanced Optical Materials
Issue Date:	2019
Publisher / Ed. Institution:	Wiley
ISSN:	2195-1071
Language:	English
Subject (DDC):	530: Physics 540: Chemistry
Abstract:	Fluorinated electro‐optic crystals with state‐of‐the‐art second‐order nonlinear optical response and excellent characteristics for terahertz (THz) wave generation are reported. The fluorinated organic ionic crystals consist of optically highly nonlinear fluorinated HM6FQ (6‐fluoro‐2‐(4‐hydroxy‐3‐methoxystyryl)‐1‐methylquinolinium) or HM7FQ (7‐fluoro‐2‐(4‐hydroxy‐3‐methoxystyryl)‐1‐methylquinolinium) cations and 4‐methylbenzenesulfonate (T) counter anions. Compared to benchmark electro‐optic crystals based on nonfluorinated HMQ (2‐(4‐hydroxy‐3‐methoxystyryl)‐1‐methylquinolinium) cations, introducing fluorine substituent on HM6FQ cations creates additional hydrogen bonds (Ar-F···H-C). Such a molecular engineering leads to an enhanced thermal stability and significant modulations of phonon vibrational modes of crystals in THz frequency region, while excellent π–π stacking and space filling characteristics of HM6FQ cations in crystals lead to state‐of‐the‐art diagonal component of the macroscopic nonlinear optical susceptibility, similar to the case of HMQ cations. HM6FQ‐based crystals exhibit a very high optical‐to‐THz conversion efficiency, comparable to benchmark HMQ‐based crystals. In addition, due to additional hydrogen bonds induced by fluorine substituents, the spectral shape of the generated THz wave is remarkably modified; e.g., the largest spectral gap is near 1.5 and 2.0 THz for HM6FQ‐ and HMQ‐based crystals, respectively. The fluorinated cationic engineering on nonlinear optical crystals having benchmark nonlinear optical response is, as far as is known, reported for the first time.
URI:	https://digitalcollection.zhaw.ch/handle/11475/15495
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP)
Appears in collections:	Publikationen School of Engineering

Files in This Item:

There are no files associated with this item.

Show full item record

Kim, S.-I., Kang, B. J., Jeong, C.-U., Shin, M.-H., Kim, W. T., Jazbinsek, M., Yoon, W., Yun, H., Kim, D., Rotermund, F., & Kwon, O.-P. (2019). Fluorinated organic electro-optic quinolinium crystals for THz wave generation. Advanced Optical Materials. https://doi.org/10.1002/adom.201801495

Kim, S.-I. et al. (2019) ‘Fluorinated organic electro-optic quinolinium crystals for THz wave generation’, Advanced Optical Materials [Preprint]. Available at: https://doi.org/10.1002/adom.201801495.

S.-I. Kim et al., “Fluorinated organic electro-optic quinolinium crystals for THz wave generation,” Advanced Optical Materials, 2019, doi: 10.1002/adom.201801495.

KIM, Se-In, Bong Joo KANG, Chan-Uk JEONG, Myeong-Hoon SHIN, Won Tae KIM, Mojca JAZBINSEK, Woojin YOON, Hoseop YUN, Dongwook KIM, Fabian ROTERMUND und O-Pil KWON, 2019. Fluorinated organic electro-optic quinolinium crystals for THz wave generation. Advanced Optical Materials. 2019. DOI 10.1002/adom.201801495

Kim, Se-In, Bong Joo Kang, Chan-Uk Jeong, Myeong-Hoon Shin, Won Tae Kim, Mojca Jazbinsek, Woojin Yoon, et al. 2019. “Fluorinated Organic Electro-Optic Quinolinium Crystals for THz Wave Generation.” Advanced Optical Materials. https://doi.org/10.1002/adom.201801495.

Kim, Se-In, et al. “Fluorinated Organic Electro-Optic Quinolinium Crystals for THz Wave Generation.” Advanced Optical Materials, 2019, https://doi.org/10.1002/adom.201801495.