Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: New benzothiazolium crystals with very large off-diagonal optical nonlinearity
Authors: Kim, Seung-Jun
Yu, In Cheol
Lee, Ji-Ah
Kim, Won Tae
Jazbinsek, Mojca
Yoon, Woojin
Yun, Hoseop
Rotermund, Fabian
Kwon, O-Pil
et. al: No
DOI: 10.1016/j.dyepig.2021.109433
Published in: Dyes and Pigments
Volume(Issue): 192
Issue: 109433
Issue Date: Aug-2021
ISSN: 0143-7208
Language: English
Subjects: THz photonics; Organic crystal; Nonlinear optics; Electro-optics
Subject (DDC): 621.3: Electrical, communications, control engineering
Abstract: In this study, we develop new organic benzothiazolium crystals possessing very large off-diagonal optical nonlinearity. In these crystals, benzothiazolium-based 2-(4-(4-(hydroxymethyl)piperidin-1-yl)styryl)-3-methyl-benzothiazol-3-ium (PMB) cations with large molecular optical nonlinearity are incorporated with two anions: 4 (trifluoromethoxy)benzenesulfonate (TFO) with an orthogonal non-planar shape and 5-bromothiophene-2-sulfonate (BTS) with a planar shape. Both PMB-TFO and PMB-BTS crystals exhibit state-of-the-art off-diagonal effective hyperpolarizability that results from the V-shape and X-shape alignments of PMB chromophores, respectively. Newly developed PMB crystals indicate excellent characteristics for second-order nonlinear optical applications such as difference-frequency generation (e.g. optical rectification) and sum-frequency generation (e.g. second-harmonic generation), which are comparable to current benchmark organic 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)
Published as part of the ZHAW project: Molecular Phonon-Mode Engineering for All-Organic Gap-Free THz Photonics
Appears in collections:Publikationen School of Engineering

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