Coupled photonic-plasmonic systems have already proven successful as ultra-sensitive sensors with the potential of single virus detection . Such systems are e.g. composed of a plasmonic nanoparticle in vicinity of an optical resonator usually in the form of a microsphere, a mirroring or a microdisk. These systems are proven highly sensitive due to their large quality factor and are thus utilized as bio, pressure, gas or temperature sensors . When a plasmonic nanoparticle is positioned near such resonator, coupling of the plasmonic and photonic modes can result in an ultra-sensitive biosensor , since nanoparticle presence enhance ambient refractive index (RI) variation sensitivity.
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