Abstract
We theoretically demonstrated a kind of plasmon coupled elliptical/crescent nanostructure to achieve a vast range of applications based on nanolaser or spaser with high intensity. To overcome the ohmic losses, the plasmon ellipse is composed of the gold film substrate with a gain media. A simple ellipse has been chosen from which a variety of dimer configurations have been formed by the symmetry alteration technique which is then tested for different light polarizations and gap variations. The proposed model supports localized surface plasmon resonance mode (LSPR). Moreover, the localized surface plasmon resonance (LSPR) property of the proposed nanostructure is numerically analysed by the finite-element method (FEM), and the results show that the electric field intensity (EFI) can be amplified to a large value by symmetry breaking in the elliptical nanostructure. Various plasmon modes can be excited by selecting the appropriate gain media. In addition to this, a compact tuneable multi-wavelength nanolaser (spaser) can be developed by using this model.
Highlights
Surface plasmon (SP) is the photon-excited collectively coherent oscillation of electrons at the surface of metallic nanostructures or films
The localized surface plasmon resonance (LSPR) property of the proposed nanostructure is numerically analysed by the finite-element method (FEM) and the results shows that the electric field intensity (EFI) can be amplified to a large values by symmetry breaking in the elliptical nanostructure
We have investigated the generation of higher order plasmonic modes in a simple elliptical structure, its possible symmetry broken versions and gap variations illuminated by a linear x-y polarized light
Summary
Surface plasmon (SP) is the photon-excited collectively coherent oscillation of electrons at the surface of metallic nanostructures or films. The green line in the plot represents the y-polarized case in which a strong peak at 1155 nm can be seen and is of similar fashion as of x-polaroid version mainly due to combination bright dipolar modes that given birth to strong plasmonic effect and we attained two hot spots along with high energy spike. Another small rise can be seen at 739.9 nm mainly occurred due to dark modes. The near field enhancement for x-polarized NED was recorded to be 910 and for y-polaroid case this value reaches to almost 310
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
