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08 Feb, 2018 · 12:00 al 08 Feb, 2018 · 14:30 Facultad de Ciencias

Seminario: Nanomechanical sensors with levitated nanoparticles in vacuum

Francesco Ricci

Conferencias, seminarios, divulgación científica

  • Fecha: 8 de Febrero
  • Lugar: Seninario del Departamento de Física Atómica, Molecular y Nuclear. Facultad de Ciencias
  • Horario: 12 horas
  • Descripción: A cargo de Francesco Ricci (ICFO – Instituto de Ciencias Fotónicas, Castelldefels, Barcelona).
    Resumen: Optomechanical systems hold great promise for the exploration of the boundaries between classic theories and quantum mechanics. Ground state cooling of mesoscopic optomechanical systems has already opened the door for a whole new family of
    experiments that pave the way for the development of quantum-enhanced sensing devices. A challenging requirement for these systems is to meet criteria of small sizes and light masses in order to feature the highest possible Q×f (mechanical quality factor times oscillation frequency) product. However, these features lead to intrinsically nonlinear behavior, and the consequent development of new sensing schemes that take nonlinearities into account becomes of upmost importance.
    In this talk, we first introduce the use of a levitated nanoparticle in vacuum as a nanomechanical system of unprecedented performance thanks to its decoupling from the environment. Subsequently, we report on the precise control of its linear, nonlinear and stochastic bistable dynamics, demonstrating how this can lead to efficient signal amplification schemes, including stochastic resonance.
    Finally, we will show how to finely control the net charge of the levitated particle, thus allowing coupling the system to an external electric field, and evaluating sensing capabilities down to the elementary charge level.
  • Organiza: Departamento de Física Atómica, Molecular y Nuclear
  • Más información: Dr. Raúl A. Rica Alarcón
    Departamento de Física Atómica, Molecular y Nuclear
    Universidad de Granada
    Avda Fuentenueva s/n
    18071, Granada, Spain
    Tel: + 34 958 24 10 00 – Ext. 20021 (Office)
    Tel: + 34 958 24 88 41 (Lab)