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Contributions of Correlated Acentric Atomic Displacements to the Nonlinear Second Harmonic Generation and Response
Journal article   Open access

Contributions of Correlated Acentric Atomic Displacements to the Nonlinear Second Harmonic Generation and Response

Antonio Cammarata and James M. Rondinelli
ACS photonics, v 1(2)
01 Feb 2014
url
https://doi.org/10.1021/ph400049hView
Published, Version of Record (VoR) Open

Abstract

Materials Science Materials Science, Multidisciplinary Nanoscience & Nanotechnology Optics Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Science & Technology - Other Topics Technology
Group theory and ab initio electronic structure calculations are combined to formulate a general protocol called "SAFOR" to understand and predict how to improve the second harmonic generation (SHG) response in acentric nonlinear optical crystals. Using the prototypical SHG borate beta-BaB2O4, we show how the SHG d-tensor can be formulated from mode effective d(ij) coefficients obtained as a linear combination of symmetry-adapted displacement patterns that transform as irreducible representations of a centrosymmetric parent structure. Since this protocol does not require any constraints on the crystal topology or anionic moieties in the structure, we suggest it constitutes a powerful tool to understand and design new SHG compounds through atomic-structure governing principles.

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Web of Science research areas
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Optics
Physics, Applied
Physics, Condensed Matter
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