On the dual-cone nature of the conical refraction phenomenon

A. Turpin*, Yu. Loiko, T. K. Kalkandjiev, H. Tomizawa, J. Mompart

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In conical refraction (CR), a focused Gaussian input beam passing through a biaxial crystal and parallel to one of the optic axes is transformed into a pair of concentric bright rings split by a dark (Poggendorff) ring at the focal plane. Here, we show the generation of a CR transverse pattern that does not present the Poggendorff fine splitting at the focal plane, i.e., it forms a single light ring. This light ring is generated from a nonhomogeneously polarized input light beam obtained by using a spatially inhomogeneous polarizer that mimics the characteristic CR polarization distribution. This polarizer allows modulating the relative intensity between the two CR light cones in accordance with the recently proposed dual-cone model of the CR phenomenon. We show that the absence of interfering rings at the focal plane is caused by the selection of one of the two CR cones. (C) 2015 Optical Society of America
Original languageEnglish
Pages (from-to)1639-1642
Number of pages4
JournalOptics Letters
Issue number8
Publication statusPublished - 15 Apr 2015

Bibliographical note

© 2015 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://doi.org/10.1364/OL.40.001639. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


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