Current browse context:
physics.optics
Change to browse by:
References & Citations
Physics > Optics
Title: Ultrafast and highly collimated radially polarized photons from a colloidal quantum dot in a hybrid nanoantenna at room-temperature
(Submitted on 11 Mar 2024 (v1), last revised 24 Mar 2024 (this version, v2))
Abstract: To harness the potential of radially polarized single photons in applications such as high-dimensional quantum key distribution (HD-QKD) and quantum communication, we demonstrate an on-chip, room-temperature device, which generates highly directional radially polarized photons at very high rates. The photons are emitted from a giant CdSe/CdS colloidal quantum dot (gQD) accurately positioned at the tip of a metal nanocone centered inside a hybrid metal-dielectric bullseye antenna. We show that due to the large and selective Purcell enhancement specifically for the out-of-plane optical dipole of the gQD, the emitted photons can have a very high degree of radial polarization (>93%), based on a quantitative metric. Our study emphasizes the importance of accurate gQD positioning for optimal radial polarization purity through extensive experiments and simulations, which contribute to the fundamental understanding of radial polarization in nanostructured devices and pave the way for implementation of such systems in practical applications using structured quantum light.
Submission history
From: Yuval Bloom Mr. [view email][v1] Mon, 11 Mar 2024 08:58:17 GMT (12050kb,D)
[v2] Sun, 24 Mar 2024 07:36:28 GMT (12049kb,D)
Link back to: arXiv, form interface, contact.