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- W3211355239 abstract "Abstract Nanosensors based on small particles are essential in the advancement of countless areas involving biomedical and fundamental physics. While the Clausius-Mossoti relation reveals the natural advantage of plasmonic nanoparticles as a singularity-generating device with the possibility of achieving ultra-high sensitivity, practical issues such as metallic losses and sensor configuration often preclude them from being considered as the ideal nanosensor. Non-plasmonic, or dielectric nanoparticles, though have distinct advantage in small material loss and design flexibility, cannot have a pole in the Clausius-Mossoti relation. Here, we demonstrate how such limitation on dipolar resonance of a dielectric nanoparticle can be fundamentally overturned if the nanoparticle is placed in an assisting dielectric cavity. Using the pseudo-orthonormal eigenmode method (POEM), we pinpoint the singularity of such non-plasmonic system in the complex frequency plane. The framework of the study provides not only analysis of the underlying physics, but also generates a set of guidelines to facilitate the device optimization in the real world. For numerical simulation, we use finite-difference time-domain (FDTD) method to demonstrate giant sensitivity of the structure when it operates around the pole." @default.
- W3211355239 created "2021-11-22" @default.
- W3211355239 creator A5039550464 @default.
- W3211355239 creator A5054165476 @default.
- W3211355239 date "2021-02-25" @default.
- W3211355239 modified "2023-09-27" @default.
- W3211355239 title "Identification of analytical singularity in non-plasmonic nano-sensing system" @default.
- W3211355239 doi "https://doi.org/10.21203/rs.3.rs-244069/v1" @default.
- W3211355239 hasPublicationYear "2021" @default.
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