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Large Electromagnetic Field Enhancement in Plasmonic Nanoellipse for Tunable Spaser Based Applications

EasyChair Preprint no. 7757

23 pagesDate: April 12, 2022


We theoretically demonstrated a class of plasmonic coupled elliptical nanostructure for achieving a spaser or a nanolaser with high intensity. The plasmonic ellipse is made up of gold film substrate. The proposed structure is then trialed for various light polarizations, moreover, a simple elliptical nanostructure has been chosen primarily from which different cases have been formed by geometry alteration. The structure supports strong coupled resonance mode i.e. localized surface plasmon (LSP). The localized surface plasmon resonance (LSPR) of the investigated system is numerically examined using the finite-element method (FEM). The calculations showed that the LSPR peaks and the local field intensity or near field enhancement (NFE) of the active nanosystem can be amplified to higher values by introducing symmetry-breaking techniques in the proposed ellipse and its variants. The coupled nanostructure having different stages of wavelengths can be excited with different plasmonic resonance modes by the selection of suitable gain media. In addition, a small-sized nanolaser with high tunability range can be developed using this nanostructure. The spaser phenomena are achieved at several wavelengths by changing light polarization and structure alteration methods. Giant localized field enhancement and high LSPR values enable the proposed model to be highly appealing for sensing applications, surface-enhanced Raman spectroscopy, and much more.

Keyphrases: Electromagnetic, finite element method, Nanomaterials

BibTeX entry
BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:
  author = {Saqib Jamil and Waqas Farooq and Najeeb Ullah and Adnan Daud Khan and Usman Khan Khalil and Amir Mosavi},
  title = {Large Electromagnetic Field Enhancement in Plasmonic Nanoellipse for Tunable Spaser Based Applications},
  howpublished = {EasyChair Preprint no. 7757},

  year = {EasyChair, 2022}}
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