Phys.org December 10, 2024 An international team of researchers (Israel, USA – UT Austin, Los Alamos National Laboratory, Germany, Italy) harnessed the potential of radially polarized photons for classical and quantum communication applications to demonstrate an on-chip, room-temperature device, which generated highly directional radially polarized photons at very high rates. The photons were 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. They showed that the emitted photons could have a very high degree of radial polarization, based on a quantitative metric. According to […]
Tag Archives: Plasmonic resonator
Reconfigurable sensor can detect particles 0.001 times the wavelength of light
Phys.org August 27, 2024 The exceptional point, a spectral singularity widely existing in non-Hermitian systems, provides an indispensable route to enhance the sensitivity of optical detection. However, the exceptional point of the systems is set once the system is built or fabricated, and machining errors make it hard to reach such a state precisely. An international team of researchers (China, Spain, Singapore) developed a highly tunable and reconfigurable exceptional point system, i.e., a single spoof plasmonic resonator suspended above a substrate and coupled with two freestanding Rayleigh scatterers. Their design offered great flexibility to control exceptional point states, enabling them […]