On the dual-cone nature of the conical refraction phenomenon

TitleOn the dual-cone nature of the conical refraction phenomenon
Publication TypeJournal Article
Year of Publication2015
AuthorsTurpin, A, Loiko, YV, Kalkandjiev, TK, Tomizawa, H, Mompart, J
JournalOptics Letters
Start Page1639
Date PublishedApr
KeywordsBirefringence, Crystal optics, Refraction

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.

Campus d'excel·lència internacional U A B