Radiation efficiency of electric and magnetic dipole antennas surrounded by a small spherical shell of lossy dielectric

1964 ◽  
Vol 12 (5) ◽  
pp. 646-647 ◽  
Author(s):  
R. Row
Keyword(s):  
Spherical Shell ◽  
Magnetic Dipole ◽  
Radiation Efficiency ◽  
Dipole Antennas ◽  
Lossy Dielectric

Single-, dual-, and triple-band metamaterial-inspired electrically small planar magnetic dipole antennas

2013 ◽  
Vol 56 (1) ◽  
pp. 83-87 ◽  
Author(s):  
Oznur Turkmen ◽  
Gonul Turhan-Sayan ◽  
Richard W. Ziolkowski
Keyword(s):  
Magnetic Dipole ◽  
Dipole Antennas ◽  
Triple Band

scholarly journals Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mojtaba Karimi Habil ◽  
Carlos J. Zapata–Rodríguez ◽  
Mauro Cuevas ◽  
Samad Roshan Entezar
Keyword(s):  
Spherical Shell ◽  
Magnetic Dipole ◽  
Spontaneous Emission ◽  
Critical Analysis ◽  
Metallic Substrate ◽  
Purcell Factor ◽  
Taper Angle ◽  
Resonant Coupling ◽  
Tapered Angle ◽  
Novel Strategy

AbstractWe propose an axisymmetric silicon nanoresonator with designed tapered angle well for the extraordinary enhancement of the decay rate of magnetic dipole (MD) emitters. Due to the resonant coupling of a MD emitter and the MD mode of the subwavelength resonator, the Purcell factor (PF) can easily reach 500, which is significantly higher than the PF when using a silicon nanosphere of the same size. The PF and the resonance frequency are conveniently tuned through the resonator diameter and the taper angle of the blind hole. When supported by a metallic substrate, further enhancement ($$>10^3$$ > 10 3 ) of the MD spontaneous emission is triggered by an image-induced quadrupolar high-Q mode of the nanoantenna. For the sake of comparison we include a critical analysis of the canonical problem that considers a Si spherical shell. Our results might facilitate a novel strategy for promising realizations of chip-scale nanophotonic applications.

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