Efficient optical-to-THz conversion organic crystals with simultaneous electron withdrawing and donating halogen substituents

Lee, Seung-Jun; Kang, Bong Joo; Shin, Myeong-Hoon; Lee, Seung-Chul; Lee, Seung-Heon; Jazbinsek, Mojca; Yun, Hoseop; Kim, Dongwook; Rotermund, Fabian; Kwon, O-Pil

doi:10.1002/adom.201700930

Publication type:	Article in scientific journal
Type of review:	Not specified
Title:	Efficient optical-to-THz conversion organic crystals with simultaneous electron withdrawing and donating halogen substituents
Authors:	Lee, Seung-Jun Kang, Bong Joo Shin, Myeong-Hoon Lee, Seung-Chul Lee, Seung-Heon Jazbinsek, Mojca Yun, Hoseop Kim, Dongwook Rotermund, Fabian Kwon, O-Pil
DOI:	10.1002/adom.201700930
Published in:	Advanced Optical Materials
Volume(Issue):	6
Issue:	2
Issue Date:	2018
Publisher / Ed. Institution:	Wiley
ISSN:	2195-1071
Language:	English
Subject (DDC):	530: Physics 620.11: Engineering materials
Abstract:	This study reports on highly efficient nonlinear optical ionic quinolinium crystals with various aromatic anions possessing different spatial volume for controlling the space‐filling characteristics and introducing halogen substituents having simultaneous electron‐withdrawing and electron‐donating effects. The quinolinium crystals with chloro and bromo substituents having simultaneous electron‐withdrawing and electron‐donating effects on anions exhibit perfect molecular ordering for optimizing the diagonal second‐order nonlinear optical response, while the fluoro substituent having relatively small electron‐donating effects on anions results in the absence of nonlinear optical response. Compared to widely used 4‐methylbenzenesulfonate, the chloro substituent on 4‐chlorobenzenesulfonate (CBS) results in decreasing π–π interactions between cations and anions. This leads on the one hand to an enhanced macroscopic nonlinear response and on the other hand to an increased strength of hydrogen bonds between anions, resulting in strong suppression of THz phonon vibration. In THz generation measurements with pump pulses at 1300 nm, 0.39 mm thick 2‐(4‐hydroxystyryl)‐1‐methylquinolinium 4‐chlorobenzenesulfonate (OHQ‐CBS) crystal exhibits excellent optical‐to‐THz conversion characteristics with 27 times higher peak‐to‐peak electric field and 3 times broader bandwidth than the well‐known 1.0 mm thick inorganic standard ZnTe crystal. In addition, compared to state‐of‐the‐art analogous quinolinium crystals with 4‐methylbenzenesulfonate, OHQ‐CBS crystal exhibits 1.8 times higher field.
URI:	https://digitalcollection.zhaw.ch/handle/11475/15443
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

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Lee, S.-J., Kang, B. J., Shin, M.-H., Lee, S.-C., Lee, S.-H., Jazbinsek, M., Yun, H., Kim, D., Rotermund, F., & Kwon, O.-P. (2018). Efficient optical-to-THz conversion organic crystals with simultaneous electron withdrawing and donating halogen substituents. Advanced Optical Materials, 6(2). https://doi.org/10.1002/adom.201700930

Lee, S.-J. et al. (2018) ‘Efficient optical-to-THz conversion organic crystals with simultaneous electron withdrawing and donating halogen substituents’, Advanced Optical Materials, 6(2). Available at: https://doi.org/10.1002/adom.201700930.

S.-J. Lee et al., “Efficient optical-to-THz conversion organic crystals with simultaneous electron withdrawing and donating halogen substituents,” Advanced Optical Materials, vol. 6, no. 2, 2018, doi: 10.1002/adom.201700930.

LEE, Seung-Jun, Bong Joo KANG, Myeong-Hoon SHIN, Seung-Chul LEE, Seung-Heon LEE, Mojca JAZBINSEK, Hoseop YUN, Dongwook KIM, Fabian ROTERMUND und O-Pil KWON, 2018. Efficient optical-to-THz conversion organic crystals with simultaneous electron withdrawing and donating halogen substituents. Advanced Optical Materials. 2018. Bd. 6, Nr. 2. DOI 10.1002/adom.201700930

Lee, Seung-Jun, Bong Joo Kang, Myeong-Hoon Shin, Seung-Chul Lee, Seung-Heon Lee, Mojca Jazbinsek, Hoseop Yun, Dongwook Kim, Fabian Rotermund, and O-Pil Kwon. 2018. “Efficient Optical-to-THz Conversion Organic Crystals with Simultaneous Electron Withdrawing and Donating Halogen Substituents.” Advanced Optical Materials 6 (2). https://doi.org/10.1002/adom.201700930.

Lee, Seung-Jun, et al. “Efficient Optical-to-THz Conversion Organic Crystals with Simultaneous Electron Withdrawing and Donating Halogen Substituents.” Advanced Optical Materials, vol. 6, no. 2, 2018, https://doi.org/10.1002/adom.201700930.