title: Omnidirectional diffraction control with rotational topological defects.
abstract: We present a new scheme for the directional diffraction management of light with incompatible transformation optics. By introducing the concept of disclinations into transformation optics, we demonstrate that the rotational incompatible mapping violates the integrability condition of the coordinate transformation and gives rise to the non-vanishing Frank vector. It is revealed that such special coordinate transformations can produce rotational topological defects in physical space, which magnifies or compresses the diffraction of light beams propagating in arbitrary directions. We verify our theoretical analysis by numerical simulations of the light scattering from a cylinder of a generic disclination medium.
authors.forename: Lina
authors.initials: L
authors.lastname: Shi
authors.forename: Hailiang
authors.initials: H
authors.lastname: Li
authors.forename: Changqing
authors.initials: C
authors.lastname: Xie
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Zhang