Abstract
A nanoscale Bragg grating reflector based on the defect metal-insulator-metal (MIM) waveguide is developed and numerically simulated by using the finite element method (FEM). The MIM-based structure promises a highly tunable broad stop-band in transmission spectra. The narrow transmission window is shown to appear in the previous stop-band by changing the certain geometrical parameters. The central wavelengths can be controlled easily by altering the geographical parameters. The development of surface plasmon polarition (SPP) technology in metallic waveguide structures leads to more possibilities of controlling light at deep sub-wavelengths. Its attractive ability of breaking the diffraction limit contributes to the design of optical sensors.
Highlights
Surface plasmon polaritions (SPPs) are mixed electromagnetic waves confining at the metal surface, which results from electromagnetic waves coupling to free electron oscillations
The MIM Bragg reflectors have a wide range of applications in optical communication fields such as optical filters [9], which have been theoretically proposed and experimentally demonstrated, single-cavity and multi-cavity structures filters [10], and tunable channel drop filters [11]
In order to realize the sensing application of the proposed MIM plasmonic Bragg grating, we
Summary
Surface plasmon polaritions (SPPs) are mixed electromagnetic waves confining at the metal surface, which results from electromagnetic waves coupling to free electron oscillations. The MIM Bragg reflectors have a wide range of applications in optical communication fields such as optical filters [9], which have been theoretically proposed and experimentally demonstrated, single-cavity and multi-cavity structures filters [10], and tunable channel drop filters [11]. Due to their unique feature of subwavelength of confinement, optical sensors are another important application of communication that can be controlled by the width [12,13], effective refractive index [14], force, and so on. Of the proposed structure shows a promising future for various applications
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