Tables for
Volume D
Physical properties of crystals
Edited by A. Authier

International Tables for Crystallography (2013). Vol. D, ch. 1.7, p. 192


B. Boulangera* and J. Zyssb

aInstitut Néel CNRS Université Joseph Fourier, 25 rue des Martyrs, BP 166, 38042 Grenoble Cedex 9, France, and bLaboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan, 61 Avenue du Président Wilson, 94235 Cachan, France
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Index surface sections in a plane containing the optic axis z of a negative uniaxial crystal allowing collinear type-I phase matching for SFG ([\omega_3=\omega_1+\omega_2]), [\gamma = 3], or for SFG ([\omega_4=\omega_1+\omega_2+\omega_3]), [\gamma = 4]. [{\bf u}^{\rm I}_{\rm PM}] is the corresponding phase-matching direction.