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Effect of Negative Index Metamaterial on the Optical Properties of Surface Polariton

Ahmadi, Mousa | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48713 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Sadighi-Bonabi, Rasoul
  7. Abstract:
  8. A coupler free scheme for directly exited surface polariton (SP) using a negative-index metamaterial (NIMM) with a bottom layer of N type quantum emitters is presented. It is shown that by suppressing the ohmic loss the giant field enhancement could be achived in a broad electromagnetically induced transparency (EIT). And this field enhancement cause the excitation of surface polariton at the NIMM-Quantum emitter interfaces. For large range of probe detuning in EIT position and the tunable excitation of SP could be accomplished for special probe angle.It is revealed that the linear and nonlinear optical properties could be controlled effectively by modulating the phase of the microwave driven field. In the linear regime the group velocity of the weak probe filed could be controlled by the slope of dispersion curve and consequently by the phase of the microwave driven field.Furthermore in the nonlinear regime the tunable kerr nonlinearity and suppressed group velocity dispersion (GVD) is achived at coherent population trapping condition. It is shown that EIT based system could be used for stable propagation of (1+1)-dimensional nonlinear solitons (i.e. Bright soliton and Dark soliton) in the CPT condition
  9. Keywords:
  10. Metamaterial ; Electromagnetical Induced Transparency ; Surface Plasmon Polariton ; Coherent Population Trapping ; Nonlinear Soliton

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