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You are here: Home / Seminars / Experimental physics and modelling / Hybrid Nano-Opto-Mechanics

Hybrid Nano-Opto-Mechanics

Benjamin Besga (Institut Néel, Grenoble)
When Nov 29, 2016
from 10:45 to 12:00
Where Centre Blaise Pascal
Attendees Benjamin Besga
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Interaction between atoms and light plays a prominent role in quantum physics since its early stages, whereas opto-mechanics more recently enters the game allowing for the observation of the quantum ground state of nano-oscillators. By combining these two fields, meaning a quantum emitter coupled to a nano-oscillator, hybrid systems aim at bringing quantum mechanics at a larger scale to study for example the quantum/classical border by generating non-classical mechanical states.
I will present two hybrid nano-mechanical experiments involving artificial atoms, namely nitrogen-vacancy (NV) center in diamond. I will first show one way to probe the signatures of these quantum emitters on the center of mass motion of a nano-diamond trapped by optical tweezers in liquid.
Then, I will introduce a hybrid system where the mechanical oscillator is a singly clamped nano-wire magnetically coupled to a single NV center attached to its free extremity. Following the nano-wire 2D trajectories reveal original thermodynamical properties and show how these nano-wires can be used as ultra-sensitive force sensors from room temperature to dilution fridge temperature. Finally I will show how this system combined with a high finesse fibre cavity allow to enter the ultra-strong opto-mechanical coupling, and paves the way to quantum hybrid opto-mechanics.