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Terahertz Radiation- and Second-Harmonic-Generation from a Single-Component Polar Organic Ferroelectric Crystal

Abstract

A rare single-component polar organic crystal with a distinctive four-fold screw axis is grown from a new dipole-molecule namely, 4-(4-(methylthio)phenyl)-2,6-di(1H-pyrazol-1-yl)pyridine (UOH1). The polar molecular ordering is facilitated by the moderate molecular dipole moment (1.42 Debye) and supramolecular (S•••H-C and N•••H-C type hydrogen bonds and π-π stack) interactions. Remarkably, UOH1 crystal exhibits a ferroelectric hysteresis loop at room temperature without any discontinuity in temperature-dependent dielectric measurements. Additional advantages of this non-centrosymmetric UOH1 crystal are its high second-order nonlinear susceptibility, superior phase matching conditions and low THz absorption. As a result, UOH1 produces both second harmonic and terahertz (THz) waves with ample energy conversion efficiency. These combinations of properties demonstrate the direct technological usefulness of UOH1 crystal as non-linear optical and electro-optical material operating at ambient temperature.

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Publication details

The article was received on 30 May 2018, accepted on 10 Aug 2018 and first published on 10 Aug 2018


Article type: Communication
DOI: 10.1039/C8TC02638F
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Terahertz Radiation- and Second-Harmonic-Generation from a Single-Component Polar Organic Ferroelectric Crystal

    U. Venkataramudu, C. Sahoo, S. Leelashree, V. M., D. Ganesh, S. R. G. Naraharisetty, A. K. Chaudhary, S. Srinath and R. Chandrasekar, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC02638F

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