Ultrafast and highly collimated radially polarized photons from a colloidal quantum dot in a hybrid nanoantenna at room-temperature
arxiv(2024)
摘要
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
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.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要