Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Molecular salt crystals with bis(head-to-tail) interionic complementary assembly for efficient organic THz generators
Authors: Kim, Deokjoong
Kim, Won Tae
Seok, Jin-Hong
Yu, In Cheol
Jazbinsek, Mojca
Yoon, Woojin
Yun, Hoseop
Kim, Dongwook
Rotermund, Fabian
Kwon, O-Pil
et. al: No
DOI: 10.1039/D0TC02225J
Published in: Journal of Materials Chemistry C
Volume(Issue): 8
Issue: 29
Pages: 10078
Pages to: 10085
Issue Date: 7-Jul-2020
Publisher / Ed. Institution: Royal Society of Chemistry
ISSN: 2050-7526
Language: English
Subjects: THz photonics
Subject (DDC): 540: Chemistry
621.3: Electrical, communications, control engineering
Abstract: We report new organic nonlinear optical salt crystals comprising bis(head-to-tail) complementary cation–anion assembly that results in extremely efficient THz wave generation. In the new salt crystals, each of the ends of the molecular anion, 4-(trifluoromethyl)benzenesulfonate, possesses bis(hydrogen-bond acceptors), while each of the ends of the nonlinear optical molecular cationic chromophore, 2-(4-(4-(hydroxymethyl)piperidin-1-yl)styryl)-3-methylbenzothiazol-3-ium, possesses bis(hydrogen-bond donors). The resulting assembly fulfills the requirements for efficient broadband THz wave generation, namely, perfectly parallel alignment of the nonlinear optical cationic chromophores for maximizing the optical nonlinearity as well as strong interionic binding interactions for reducing self-absorption of the generated THz waves. The new benzothiazolium crystals provide extremely high optical-to-THz conversion efficiency with a broad THz spectral bandwidth of 8 THz, where the peak-to-peak THz electric field amplitude is 36 times higher than that of the benchmark inorganic 1.0 mm-thick ZnTe crystal when pumped at 1300 nm and also notably higher than those of benchmark organic analogous crystals.
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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