Gian electric and magnetic Purcell factor in dielectric oligomers
Autori: Rocco D., Lamprianidis A., Miroshnichenko AE., De Angelis C.
Affiliazione autori: Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; INO CNR, Natl Inst Opt, Via Branze 45, I-25123 Brescia, Italy; Karlsruhe Inst Technol, Inst Theoret Solid State Phys, D-76128 Karlsruhe, Germany; Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia
Abstract: We study the near-field enhancement of oligomers composed of high-refractive-index spherical particles. The huge enhancement of the electromagnetic field in the gap between the particles is observed. We reveal that this phenomenon is associated with the Fano-like resonances of both electric and magnetic multipole contributions inside each particle. We also predict that electric and magnetic Purcell factors can be strongly enhanced, being larger than 10(3). The obtained results represent an important guideline for the realization of dielectric structures to enhance the spontaneous emission rate of quantum sources and various two-level systems. (C) 2020 Optical Society of America
Giornale/Rivista: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B: OPTICAL PHYSICS
Volume: 37 (9) Da Pagina: 2738 A: 2744
Parole chiavi: FAR-FIELD PROPERTIES; 2ND-HARMONIC GENERATION; FANO RESONANCE; QUANTUM-DOT; NANOANTENNAS; DIRECTIVITY; SCATTERING; ANTENNASDOI: 10.1364/JOSAB.399665Link per visualizzare la scheda su IsiWeb: Clicca qui