Directional Dipole Dice Enabled by Anisotropic Chirality
arXiv:2208.04151 · doi:10.1073/pnas.2301620120
Abstract
Directional radiation and scattering play an essential role in light manipulation for various applications in integrated nanophotonics, antenna and metasurface designs, quantum optics, etc. The most elemental system with this property is the class of directional dipoles, including the circular dipole, Huygens dipole, and Janus dipole. A unified realization of all three dipole types and a mechanism to freely switch among them are previously unreported, yet highly desirable for developing compact and multifunctional directional sources. Here, we theoretically and experimentally demonstrate that the synergy of chirality and anisotropy can give rise to all three directional dipoles in one structure at the same frequency under linearly polarized plane wave excitations. This mechanism enables a simple helix particle to serve as a directional dipole dice (DDD), achieving selective manipulation of optical directionality via different "faces" of the particle. We employ three "faces" of the DDD to realize face-multiplexed routing of guided waves in three orthogonal directions with the directionality determined by spin, power flow, and reactive power, respectively. This construction of the complete directionality space can enable the unprecedented high-dimensional control of both near-field and far-field directionality with broad applications in photonic integrated circuits, quantum information processing, and subwavelength-resolution imaging.
arXiv comment17 pages, 16 figures
References in corpus (17)
- Spin-orbit interactions of light
- Chiral Quantum Optics
- Directional visible light scattering by silicon nanoparticles
- Chiral plasmonics
- Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
- Directional emission of light from a nano-optical Yagi-Uda antenna
- Lateral Optical Force On Chiral Particles Near a Surface
- Metasurface integrated Vertical Cavity Surface Emitting Lasers for programmable directional lasing emissions
- Optical diode based on the chirality of guided photons
- Janus and Huygens' dipolar sources for near-field directionality
- Arbitrary order exceptional point induced by photonic spin-orbit interaction in coupled resonators
- Transverse spin dynamics of light: the generalized spin-momentum locking for structured guided modes
- Experimental Realization of Near-Field Photonic Routing with All-Electric Metasources
- Intrinsic multipolar contents of nanoresonators for tailored scattering
- Huygens' Dipole for Polarization-Controlled Nanoscale Light Routing
- Spin-momentum locked interaction between guided photons and surface electrons in topological insulators
- Optical Forces in Coupled Chiral Particles