Journal
ADVANCED PHOTONICS
Volume 3, Issue 6, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.AP.3.6.064001
Keywords
photonic angular momentum; spin angular momentum; orbital angular momentum; transverse spin; transverse orbital angular momentum; spatiotemporal optical vortex
Categories
Funding
- National Natural Science Foundation of China [92050202, 61805142, 61875245]
- Shanghai Science and Technology Committee [19060502500]
- Shanghai Natural Science Foundation [20ZR1437600]
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The combination of photonic OAM and SAM provides additional information for new sensing mechanisms and light-matter interactions. Diverse photonic SAM and OAM states can be generated through careful engineering of optical fields. Specifically engineered photonic AM states have potential applications in optical tweezers, directional coupling, and optical information transmission and processing.
Structured light with inhomogeneous phase, amplitude, and polarization spatial distributions that represent an infinite-dimensional space of eigenstates for light as the ideal carrier can provide a structured combination of photonic spin and orbital angular momentum (OAM). Photonic spin angular momentum (SAM) interactions with matter have long been studied, whereas the photonic OAM has only recently been discovered, receiving attention in the past three decades. Although controlling polarization (i.e., SAM) alone can provide useful information about the media with which the light interacts, light fields carrying both OAM and SAM may provide additional information, permitting new sensing mechanisms and light-matter interactions. We summarize recent developments in controlling photonic angular momentum (AM) using complex structured optical fields. Arbitrarily oriented photonic SAM and OAM states may be generated through careful engineering of the spatial and temporal structures of optical fields. Moreover, we discuss potential applications of specifically engineered photonic AM states in optical tweezers, directional coupling, and optical information transmission and processing.
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