Science, Space and Technology News 2024
A quantum emitter centrally placed within a hybrid metal-dielectric bullseye antenna, designed for highly directional photon emission. The antenna’s unique structure allows photons to be efficiently coupled directly into an optical fiber, showcasing a pivotal enhancement in quantum photonics technology with implications for secure communication and advanced quantum computing applications. Credit: Alexander Nazarovsources into small chips that operate at room temperature.
The study demonstrates the versatility of this concept by fabricating devices containing either colloidal quantum dots or nanodiamonds containing silicon-vacancy centers, both are excellent single photon emitters even at room temperature. These emitters were accurately positioned using two distinct nanopositioning methods.Remarkably, both types of back-excited devices exhibited front collection efficiencies of approximately 70% at numerical apertures as low as 0.5.
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