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The Behavior of an Optomechanical System with Two Mechanical Modes in the Presence of Nonlinear Medium

Darvishi, Morteza | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51564 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Bahrampour, Alireza
  7. Abstract:
  8. A cavity optomechanical system is created when the resonance frequency of an optical cavity is influenced by the position of a mechanical oscillator. To observe quantum effects and quantum applications of these systems, cooling of mechanical mode(s) participating in these interactions is very important. At first, the dissertation focus on the trend that people were trying to study radiation pressure theoretically and experimentally and then present classical and the quantum picture of radiation pressure. Next, the diverse geometries are based on the optomechanical interaction are described concisely. Fabry-Perot cavity with one degree of freedom has considered and then the Stokes and The anti-stokes process, both classically and quantum has investigated. Cooling for a single mechanical mode in the presence of nonlinear medium of an optical parametric amplifier (OPA) has done. In addition to cooling rates, using the quantum Langevin equations and definition of total energy, the simultaneous cooling in different situations and presence of nonlinear effects including OPA, Kerr, and phase noise of OPA pump field, for every two movable mirrors of Fabry-Perot cavity, has also investigated and approach to ground state cooling for each mechanical resonator with the aid of single optical mode have studied. In addition to the simultaneous cooling of two independent mechanical modes by exploiting the single optical mode, the squeezing of output optical field also in different circumstances has explored
  9. Keywords:
  10. Optomechanical Coupling ; Fabry-Perot Cavity With Two Movable Mirrors ; Simultaneous Cooling ; Nonlinear Medium

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