Loading...

Analysis and Simulation of a Graphene Based Plasmon Laser

Behjati Ardakani, Sadreddin | 2019

408 Viewed
  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 52844 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Faez, Rahim
  7. Abstract:
  8. In the present thesis, the SPASER is investigated, from theory to structure design. SPASER is a counterpart of laser in 3D subwavelength dimentions. In other words, SPASER does not suffer from the diffraction limit of photons which is a drawback in laser technology. It potentially can generate intense coherent dark and bright surface plasmon modes. The small size of SPASER gives it the capability of being integrated with electronic chips. So, the electronic technology will become faster if the SPASER is realized. In this thesis, we intend to use the unique plasmonic properties of graphene in our designs. Plasmons on graphene platforms have longer propagation length and larger lifetime in comparison with metal ones. The work is devided to two stages. In the first stage, we analyze the SPASER quantum mechanically. In the quantum mechanical approach both the field and matter are quantized. In deriving the equations of motion of SPASER dynamics, the Heisenberg-Langevin approach is exploited. After deriving the Heisenberg-Langevin equations, the system is analyzed in steady state conditions and the spasing condition and threshold pumping rate is calculated. Then, the SPASER linewidth is approximated by the application of phase diffusion model to the equations of motion. In the second stage, three different structures are introduced. The structures are analyzed thoroughly and the conditions for spasing are examined. We show that the realization of SPASER although difficult but is not an unachievable goal
  9. Keywords:
  10. Graphene ; Heisenberg-Langevin Equations ; Phase Diffusion Model ; SPASER Nanolaser ; Plasmon Nanolasers ; Motion Equation

 Digital Object List

 Bookmark

...see more