| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1533202 | Optics Communications | 2016 | 8 Pages |
•A method is proposed for the transformation between two arbitrary 3D wavefronts through a flat impedance-matched dielectric material.•The method is used to convert a solid beam into a hollow beam with desired wavefront.•By tuning the transformation surface, different hollow beams can be generated.•The results are further validated by 3D finite-difference time-domain simulations.
We propose a three-dimensional (3D) phase transformation method by an impedance-matched dielectric slab and apply it to generating hollow beams. We first employ transformation optics to establish a method for the transformation between two arbitrary 3D wavefronts through a flat dielectric and impedance-matched material. Then the method is used to convert a solid beam into a hollow beam with desired wavefront. By tuning the transformation surface, different hollow beams can be produced. The results are further validated by 3D finite-difference time-domain simulations.
