Algebra of light: multiplication and division of orbital angular momentum
- Resource Type
- Conference
- Authors
- Ruffato, Gianluca; Romanato, Filippo
- Source
- 2020 Italian Conference on Optics and Photonics (ICOP) Optics and Photonics (ICOP), 2020 Italian Conference on. :1-4 Sep, 2020
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Optical diffraction
Optical device fabrication
Adaptive optics
Optical imaging
Optical design
Laser beams
Spirals
orbital angular momentum
circular-sector transformation
multiplication
division
diffractive optics
electron-beam lithography
- Language
A novel type of diffractive optics is presented to perform the multiplication and division of the orbital angular momentum (OAM) of light beams in an efficient and compact way. The technique is based on the combination of circular-sector transformations, engineered to split and map conformally the azimuthal phase gradient of OAM beams onto complementary circular sectors. The optical elements have been fabricated with high-resolution electron-beam lithography and tested on an optical bench in the visible range in order to prove the designed optical operations on OAM beams.