Title
Einstein beams: Optical beams following gravitationally lensed trajectories
Date Issued
01 January 2021
Access level
metadata only access
Resource Type
conference paper
Author(s)
Freedman J.M.
Colgate University
Publisher(s)
SPIE
Abstract
We use a spatial light modulator (SLM) to mimic the effect of gravity and steer the light from a laser to observe Einstein rings with a laboratory camera. The derived programming of the phase of the SLM follows a logarithmic dependence with impact parameter. As expected, we also observe arcs when the source and lensing object are not in line with the observer. Measurements for distinct parameters are consistent with the expectations. The coherent optical beams that are programmed to follow gravitational lensing trajectories have a transverse mode consistent with Bessel functions, yet they do not exhibit the non-diffracting properties of Bessel beams: They expand linearly with the propagation distance. The addition of a vortex phase also produces patterns that coincide with Bessel modes of order given by the topological charge of the vortex.
Volume
11701
Language
English
OCDE Knowledge area
Astronomía
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-85105917545
Source
Proceedings of SPIE - The International Society for Optical Engineering
ISSN of the container
0277786X
ISBN of the container
9781510642379
Conference
Complex Light and Optical Forces XV 2021
Sponsor(s)
This work was funded by NSF grant PHY2011937. We thank Warner Miller for motivating discussions.
Sources of information:
Directorio de Producción Científica
Scopus