2021/09/30 by Ben Lang, Dara P. S. McCutcheon, Dara P. S. McCutcheon +3
Materials Science · Physics and Astronomy · #Chirality (physics) #Circular polarization #Common emitter #Dipole #Imperfect #Metamaterials and Metasurfaces Applications #Photonic Crystals and Applications #Polarization (electrochemistry) #Quantum #Quantum optics #Quantum optics and atomic interactions #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevlett.128.073602
published as Phys. Rev. Lett. 128, 073602 (2022) · 6 pages, 4 figures, plus supplementary
arxiv created 2022/02/16 · openalex publication_date 2022/02/16 · arxiv updated 2022/02/17 · openalex created_date 2022/02/24 · openalex updated_date 2026/08/02
Unidirectional (chiral) emission of light from a circular dipole emitter into a waveguide is only possible at points of perfect circular polarization (C points), with elliptical polarizations yielding a lower directional contrast. However, there is no need to restrict engineered systems to circular dipoles, and with an appropriate choice of dipole unidirectional emission is possible for any elliptical polarization. Using elliptical dipoles, rather than circular, typically increases the size of the area suitable for chiral interactions (in an exemplary mode by a factor ∼30), while simultaneously increasing coupling efficiencies. We propose illustrative schemes to engineer the necessary elliptical transitions in both atomic systems and quantum dots.