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Ultrafast and Highly Collimated Radially Polarized Photons at Room Temperature from a Colloidal Quantum Dot Coupled to a Hybrid Nanoantenna

Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide To harness the potential of radially polarized photons for classical and quantum communication applications, 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.
DOI: 10.1021/acsphotonics.4c01516
Authors: Alexander Nazarov, Yuval Bloom, Boaz Lubotzky, Hamza Abudayyeh, Annika Mildner, Lorenzo Baldessarini, Yuval Shemla, Eric G. Bowes, Monika Fleischer, Jennifer A. Hollingsworth, Ronen Rapaport
Institutions: Hebrew University of Jerusalem, The University of Texas at Austin, University of Tübingen, University of Trento, Columbia University, Los Alamos National Laboratory, Center for Integrated Nanotechnologies
Language: English
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4403053906
FWCI: 0.523
Cites: 53
Cited by: 5
Related to: 10