Single-photon circularly polarized single-mode vortex beams
- URL: http://arxiv.org/abs/2305.08223v1
- Date: Sun, 14 May 2023 18:50:04 GMT
- Title: Single-photon circularly polarized single-mode vortex beams
- Authors: Xujing Liu, Yinhui Kan, Shailesh Kumar, Danylo Komisar, Changying
Zhao, Sergey I. Bozhevolnyi
- Abstract summary: On-chip generation of single photons encoded with single-mode SAM-OAM states has been a major challenge.
We demonstrate on-chip room-temperature generation of well-collimated (divergence 7.5 degrees) circularly polarized single-mode vortex beams.
The developed approach can straightforwardly be extended to produce multiple, differently polarized, single-mode single-photon radiation channels.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Generation of single photons carrying spin and orbital angular momenta (SAM
and OAM) opens enticing perspectives for exploiting multiple degrees of freedom
for high-dimensional quantum systems. However, on-chip generation of single
photons encoded with single-mode SAM-OAM states has been a major challenge.
Here, by utilizing carefully designed anisotropic nanodimers fabricated atop a
substrate, supporting surface plasmon polariton (SPP) propagation, and
accurately positioned around a quantum emitter (QE), we enable nonradiative
QE-SPP coupling and the SPP outcoupling into free-space propagating radiation
featuring the designed SAM and OAM. We demonstrate on-chip room-temperature
generation of well-collimated (divergence < 7.5 degrees) circularly polarized
(chirality > 0.97) single-mode vortex beams with different topological charges
(l = 0, 1, and 2) and high single-photon purity, g(0) < 0.15. The developed
approach can straightforwardly be extended to produce multiple, differently
polarized, single-mode single-photon radiation channels, and enable thereby
realization of high-dimensional quantum sources for advanced quantum photonic
technologies.
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