Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster: Quantum Optics and Photonics II

Q 27.61: Poster

Tuesday, March 1, 2016, 16:30–19:00, Empore Lichthof

A nano-mechanical oscillator inside a hollow core photonic crystal fiber — •David Grass, Julian Fesel, Nikolai Kiesel, and Markus Aspelmeyer — University of Vienna

Optical levitation of nano-particles has attracted significant attention as ultra-high Q mechanical oscillators for force sensing applications and in the context of quantum optomechanics. We report an optical conveyor belt for transport of levitated nano-particles over several centimeters in air or vacuum inside a hollow core photonic crystal fiber. Detection of the transmitted light field allows 3-dimensional read-out of the particles’ center of mass motion. An additional laser enables 1-dimensional radiation pressure based feedback cooling over the whole fiber length. This enables a precise measurement of the damping due to the local environment of the levitated particle i.e. the pressure. It allows a measurement of the pressure distribution inside a hollow core fiber (10cm long, 10µm diameter) that connects two reservoirs separated by several orders of magnitude in pressure. Next steps include force sensing applications when the particle is functionalized, e.g., with a single or few charges to sense local electric fields.