Journal
PHYSICA SCRIPTA
Volume 98, Issue 11, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1402-4896/acff45
Keywords
Purcell factor; spontaneous emission; hybrid plasmonic resonator; BOR-FDTD
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In this study, a computational analysis is conducted on the Purcell factor enhancement for a novel hybrid-plasmonic ring resonator using a novel implementation of the body-of-revolution finite-difference time-domain method. The hybrid resonator exhibits high quality-factor values and small mode volumes, making it suitable for multi-emitter applications.
We present a computational study of Purcell factor enhancement for a novel hybrid-plasmonic ring resonator using a novel implementation of the body-of-revolution (BOR) finite-difference time-domain (FDTD) method. In this hybrid structure, a dielectric slot ring is surrounded by a metallic ring such that a hybrid plasmonic mode is generated within two thin low-index gaps. The surrounding metallic ring decreases the binding loss for small ring radii, leading to high-quality factors and mode-field confinement. The hybrid resonator shows high quality-factor values above 103 and small mode volumes down to 10-3(lambda/n)(3) simultaneously, thus providing large Purcell factors (F p > 10(4)). The distributed strong confinement within two gaps renders the proposed resonator useful for multi-emitter applications.
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