Year: 2025
Type: article
Abstract: We report nanoantenna designs that emit entangled photons of distinct energy from two-photon spontaneous emission (TPSE) in different far-field directions with high quantum efficiency. To model the designs, we use a framework that computes the TPSE spectra of a quantum emitter near arbitrarily shaped nanostructures via the classical computation of the one-photon Purcell factors. A first structure exploits both the dipolar and the quadrupolar mode on a single silver nanorod. A second geometry employs dipolar modes on two perpendicular nanorods. An efficient and directional functionality is useful to develop highly compact, integrated entangled two-photon sources.
Source: Optics Letters
DOI: 10.1364/ol.539545
Authors: Steve Smeets, Bjorn Maes, Gilles Rosolen
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Award: G3557032895
OpenAlex ID: W4407423613