Synthetic dimension in photonics

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Abstract
The physics of a photonic structure is commonly described in terms of its apparent geometric dimensionality. On the other hand, with the concept of synthetic dimension, it is in fact possible to explore physics in a space with a dimensionality that is higher as compared to the apparent geometrical dimensionality of the structures. In this review, we discuss the basic concepts of synthetic dimension in photonics, and highlight the various approaches toward demonstrating such synthetic dimensions for fundamental physics and potential applications.
Funding Information
  • U.S. Department of Defense (DOD) (N00014-17-1-3030)
  • Air Force Office of Scientific Research (AFOSR) (FA9550-17-1-0002)
  • National Science Foundation (NSF) (CBET-1641069)

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