|Title||On the dual-cone nature of the conical refraction phenomenon|
|Publication Type||Journal Article|
|Year of Publication||2015|
|Authors||Turpin, A, Loiko, YV, Kalkandjiev, TK, Tomizawa, H, Mompart, J|
|Keywords||Birefringence, 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.