Phys.org September 7, 2021
An international team of researchers (Russia, Germany, Australia) investigated radiation properties of physical systems composed of a single ultrahigh permittivity dielectric hollow disk excited by electric or magnetic point like dipole antennas, placed inside the inner bore. Using analytical and numerical methods, they demonstrated that such systems could support anapole states with total suppression of far-field radiation and thereby exhibit the properties of electric or magnetic nonradiating sources. They showed that the suppression of the far-field radiated power is a result of the destructive interference between radiative contributions of the point like dipole antennas and the corresponding induced dipole moments of the hollow disk. The results pave the way to create and realize compact nonradiative sources for applications in modern wireless power transfer systems, sensors, RFID tags, and medical technologies…read more. TECHNICAL ARTICLEÂ
Schematic view of the NR electric source consisting of a dielectric hollow disk… Credit: Phys. Rev. Lett. 127, 096804, 27 August 2021Â