INVITATION
to a TALK by
Ewold Verhagen
AMOLF, the Netherlands
Controlling nanomechanical motion in time-modulated optomechanical networks
We explore the unusual states of mechanical motion that emerge in resonator networks that are fully induced and controlled through radiation pressure drives. Temporal modulation of the interactions between photons and phonons in on-chip silicon nano-optomechanical systems allow creating arbitrary quadratic bosonic Hamiltonians for small collections of mechanical resonators. Judicious breaking of time-reversal symmetry and Hermiticity then induces collective mechanical ‘metamaterial’ responses that are unlike those of regular, passive materials. These include unidirectional flow of sound, as well as topological phononic states such as the quantum Hall effect and a bosonic version of the Kitaev chain. I will discuss the implications of the observed phenomena for directional amplification and sensing enhancement. Looking ahead, we explore the use of nonlinear interactions to study the fundamentals of information processing, and strong time-modulated optical forces as a new resource for mechanical squeezing and quantum control of motion.
Thursday, May 23rd, 2024 – 14:00 s.t.
Christian Doppler lecture hall, 3rd floor
Boltzmanngasse 5, 1090 Vienna
Hosted by: Uroš Delić
