Quadrupolar interactions to achieve high Q plasmon induced transparency Conference Paper uri icon

abstract

  • 2018 SPIE. Dipole induced quadrupole resonance leads to transmission peak within the broad dipole absorption as shown in plasmonic metamaterials. We show quadrupolar interactions as a new paradigm to control this classical analogue of electromagnetically induced transparency (i.e. plasmon induced transparency, PIT) in metamaterials. While the asymmetry factor of the resultant Fano line shape of a EIT spectrum limits the quality factor (Q) of the resonance and thus the sensing application, we show that quadrupolar interactions give a handle on the Q factor. A Q as high as 600 is seen in simulations at about 0.977 THz. Limited by the experimental resolution, a Q of about 100 is observed. Further plasmonic structures can be designed to make use of the quadrupolar interactions for high sensitive devices at THz frequencies.

name of conference

  • Next-Generation Spectroscopic Technologies XI

published proceedings

  • NEXT-GENERATION SPECTROSCOPIC TECHNOLOGIES XI, 2018

author list (cited authors)

  • Rana, G., Deshmukh, P., Duttagupta, S. P., Prabhu, S. S., Achanta, V. G., & Agarwal, G. S.

complete list of authors

  • Rana, Goutam||Deshmukh, Prathmesh||Duttagupta, SP||Prabhu, SS||Achanta, Venu Gopal||Agarwal, GS

editor list (cited editors)

  • Druy, M. A., Crocombe, R. A., Barnett, S. M., Profeta, L. T., & Azad, A. K.