Photonic Nanojets and Whispering Gallery Modes in Smooth and Corrugated Micro-Cylinders under Point-Source Illumination

We numerically investigate the generation of photonic nanojets (PNJs) and the excitation of whispering gallery modes (WGMs) supported by both smooth and corrugated dielectric micro-cylinders under point-source illumination. Results show that the location of the point-source defines the location and...

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Bibliographic Details
Published in:Photonics 2020, Vol.7 (3), p.50
Main Authors: Mahariq, Ibrahim, Abdeljawad, Thabet, Karar, Abdullah S., Alboon, Shadi A., Kurt, Hamza, Maslov, Alexey V.
Format: Article
Language:English
Subjects:
Accuracy
Cylinders
dielectric micro-cylinders
Electric fields
Finite element analysis
Helmholtz equations
Illumination
Investigations
Microscopy
photonic nanojets
Photonics
point-source illumination
Propagation
Quantum dots
Stability
Whispering gallery modes
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Summary:We numerically investigate the generation of photonic nanojets (PNJs) and the excitation of whispering gallery modes (WGMs) supported by both smooth and corrugated dielectric micro-cylinders under point-source illumination. Results show that the location of the point-source defines the location and properties of PNJs, whereas stability of WGMs exists in smooth micro-cylinders but vanishes in corrugated ones. It is shown that the location of the point-source acts as an additional degree of freedom for controlling the characteristics of the generated PNJs for both smooth and corrugated dielectric micro-cylinders. Furthermore, the influence of the point-source location on the stability of the excited WGMs was diminished for the smooth micro-cylinders, while being fully pronounced for their corrugated counterparts.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics7030050