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Nonlinear frequency conversions via weak surface polaritonic wave breaking in a hybrid plasmonic waveguide

Asgarnezhad Zorgabad, S ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1364/OL.402282
  3. Publisher: OSA - The Optical Society , 2020
  4. Abstract:
  5. Material design and input field properties limit high-harmonic excitation efficiency of surface-plasmon polaritons (SPPs) in a nanoscopic device. We remedy these limitations by developing a concept for a plasmonic waveguide that exploits spatiotemporal control of a weak surface polaritonic field to create efficient four-wave mixing (FWM) and periodic phase singularities. Our configuration comprises four-level double 3-type atomic medium (43 As) doped in a lossless dielectric situated above a negative-index metamaterial (NIMM) layer. We report the coherent excitation and propagation of the multiple surface polaritonic shock waves (SWs) and establish the highly efficient frequency combs by surface polaritonic wave (SPW) breaking. Consequently, multiple FWM and periodic plasmonic phase singularity patterns generate through nonlinear self-defocusing control commensurate with the plasmonic noise within the atomic electromagnetically induced transparency (EIT) window. Our work introduces SW formation within the subwavelength scale and generates efficient nonlinear frequency conversion, thereby opening prospects for designing fast optical modulators and nonlinear plasmonic gates. © 2020 Optical Society of America
  6. Keywords:
  7. Electromagnetic wave polarization ; Four wave mixing ; Light modulators ; Optical frequency conversion ; Plasmonic metamaterials ; Shock waves ; Slow wave structures ; Surface plasmon resonance ; Waveguides ; Coherent excitations ; Electromagnetically-induced transparency ; Hybrid plasmonic waveguides ; Lossless dielectrics ; Negative index metamaterial ; Nonlinear frequency conversion ; Spatiotemporal control ; Surface plasmon polaritons ; Surface plasmons ; Excitation ; Noise ; Shock wave
  8. Source: Optics Letters ; Volume 45, Issue 19 , 2020 , Pages 5432-5435
  9. URL: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-19-5432