In this study, an all-dielectric metamaterial absorber consisting of a ring nanocavity array, spacer layer, and metallic substrate is designed investigated. The simulation results show that the two perfect absorption peaks (99.91% 99.96%) are achieved at 539 nm 673 nm. resonance modes caused by different electric magnetic field distributions structure lead to sensing properties. addition, influ...

Abstract The spatiotemporal dynamics of a surface plasmon polariton (SPP) wave packet (WP) that interacts with plasmonic nanocavity on metal are investigated via femtosecond time-resolved two-photon fluorescence microscopy and numerical calculations. nanocavity, which consists metal–insulator–metal (MIM) laminar structure (longitudinal length: ∼100 nm), behaves as subwavelength meta-atom posses...

We demonstrate high-contrast electro-optic modulation of a photonic crystal nanocavity integrated with an electrically gated monolayer graphene. A silicon air-slot nanocavity provides strong overlap between the resonant optical field and graphene. Tuning the Fermi energy of the graphene layer to 0.85 eV enables strong control of its optical conductivity at telecom wavelengths, which allows modu...

Ferritins are spherical, cage-like proteins with nanocavities formed by multiple polypeptide subunits (four-helix bundles) that manage iron/oxygen chemistry. Catalytic coupling yields diferric oxo/hydroxo complexes at ferroxidase sites in maxi-ferritin subunits (24 subunits, 480 kDa; plants, animals, microorganisms). Oxidation occurs at the cavity surface of mini-ferritins/Dps proteins (12 subu...

We present a model to describe the response of chip-based nanocavity sensors during extracellular recording of action potentials. These sensors feature microelectrodes which are embedded in liquid-filled cavities. They can be used for the highly localized detection of electrical signals on a chip. We calculate the sensor's impedance and simulate the propagation of action potentials. Subsequentl...

We describe the resonant excitation of a single quantum dot that is strongly coupled to a photonic crystal nanocavity. The cavity represents a spectral window for resonantly probing the optical transitions of the quantum dot. We observe narrow absorption lines attributed to the single and biexcition quantum dot transitions and measure antibunched population of the detuned cavity mode [g{(2)}(0)...