Dichlorinated organic‐salt terahertz sources for THz spectroscopy

Shin, Bong‐Rim; Yu, In Cheol; Jazbinsek, Mojca; Yoon, Woojin; Yun, Hoseop; Kim, Sang‐Wook; Kim, Dongwook; Rotermund, Fabian; Kwon, O‐Pil

doi:10.1002/adom.202202027

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-30288

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Dichlorinated organic‐salt terahertz sources for THz spectroscopy
Authors:	Shin, Bong‐Rim Yu, In Cheol Jazbinsek, Mojca Yoon, Woojin Yun, Hoseop Kim, Sang‐Wook Kim, Dongwook Rotermund, Fabian Kwon, O‐Pil
et. al:	No
DOI:	10.1002/adom.202202027 10.21256/zhaw-30288
Published in:	Advanced Optical Materials
Volume(Issue):	11
Issue:	4
Page(s):	2202027
Issue Date:	Feb-2023
Publisher / Ed. Institution:	Wiley
ISSN:	2195-1071
Language:	English
Subjects:	THz Photonics; Halogen bonds; Terahertz waves; Nonlinear optics; Self-assembly; Organic crystals
Subject (DDC):	621.3: Electrical, communications, control engineering
Abstract:	Although in terahertz (THz) source materials molecular anions significantly influence the performance of THz generation, only limited classes of molecular counter anions have been reported. Here, utilizing dichlorinated molecular anions in THz generators is reported for the first time, to the best of our knowledge. In these new crystals, two dichlorinated molecular anions with different molecular symmetries, asymmetric 3,4-dichlorobenzenesulfonate (34DCS) and symmetric 3,5-dichlorobenzenesulfonate (35DCS), are incorporated with a 2-(4-hydroxystyryl)-1-methylquinolinium (OHQ) cation possessing top-level molecular optical nonlinearity. OHQ-34DCS exhibits a strong nonlinear optical response, in contrast to OHQ-35DCS. In OHQ-34DCS crystals, the dichlorinated groups form strong halogen bonds (XBs) and hydrogen bonds (HBs), which are beneficial for suppressing molecular (phonon) vibrations. The optical-to-THz conversion efficiency of the OHQ-34DCS crystals is extremely high, comparable to that of the benchmark organic THz generators. Moreover, the THz emission spectra from the OHQ-34DCS crystals, compared to those of previously reported benchmark analogous crystals, are stronger modulated toward a flatter shape, but possess substantially reduced spectral dimples. Therefore, the introduction of dichlorinated molecular anions is an efficient approach for the design of highly efficient electro-optic salt crystals as efficient broadband THz wave sources.
URI:	https://digitalcollection.zhaw.ch/handle/11475/30288
Fulltext version:	Accepted 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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Shin, B.-R., Yu, I. C., Jazbinsek, M., Yoon, W., Yun, H., Kim, S.-W., Kim, D., Rotermund, F., & Kwon, O.-P. (2023). Dichlorinated organic‐salt terahertz sources for THz spectroscopy. Advanced Optical Materials, 11(4), 2202027. https://doi.org/10.1002/adom.202202027

Shin, B.-R. et al. (2023) ‘Dichlorinated organic‐salt terahertz sources for THz spectroscopy’, Advanced Optical Materials, 11(4), p. 2202027. Available at: https://doi.org/10.1002/adom.202202027.

B.-R. Shin et al., “Dichlorinated organic‐salt terahertz sources for THz spectroscopy,” Advanced Optical Materials, vol. 11, no. 4, p. 2202027, Feb. 2023, doi: 10.1002/adom.202202027.

SHIN, Bong‐Rim, In Cheol YU, Mojca JAZBINSEK, Woojin YOON, Hoseop YUN, Sang‐Wook KIM, Dongwook KIM, Fabian ROTERMUND und O‐Pil KWON, 2023. Dichlorinated organic‐salt terahertz sources for THz spectroscopy. Advanced Optical Materials. Februar 2023. Bd. 11, Nr. 4, S. 2202027. DOI 10.1002/adom.202202027

Shin, Bong‐Rim, In Cheol Yu, Mojca Jazbinsek, Woojin Yoon, Hoseop Yun, Sang‐Wook Kim, Dongwook Kim, Fabian Rotermund, and O‐Pil Kwon. 2023. “Dichlorinated Organic‐Salt Terahertz Sources for THz Spectroscopy.” Advanced Optical Materials 11 (4): 2202027. https://doi.org/10.1002/adom.202202027.

Shin, Bong-Rim, et al. “Dichlorinated Organic‐Salt Terahertz Sources for THz Spectroscopy.” Advanced Optical Materials, vol. 11, no. 4, Feb. 2023, p. 2202027, https://doi.org/10.1002/adom.202202027.