Quantum Sensing

Small TrappingOptomechanical sensors live at the intersection of nanomechanical devices and quantum optical control. For the Quantum Sensing group, our main experimental sensing line consists of tiny glass particles (diameter of about 100 nm) which are levitated against gravity using optical (laser traps) or electrostatic (Paul traps) forces. A typical optical experimental layout (see figure) consists of a vacuum chamber, optical components and control electronics. For our investigations we use quantum optics techniques, such as homo-, heterodyne and lock-in detection, feedback control, or optical cavity coupling and read-out [1]. Excellent system isolation, along with these techniques, enable us to push the performance limit of our sensors beyond the thermal noise limit into a regime where quantum mechanical effects (mesoscopic superposition states, squeezing, etc.) can be investigated and utilized. One example of pushing a rotational sensor into the quantum regime is our recent work with ETH Zurich [2]. We introduced a mechanical nanorotor into a regime where its rotational motion is no longer limited by thermal noise, but by the quantum vacuum fluctuations of light.

[1] D. Windey,  C. Gonzalez-Ballestero, P. Maurer, L. Novotny, O. Romero-Isart, and R. Reimann, Cavity-Based 3D cooling of a Levitated Nanoparticle via Coherent Scattering ,Phys. Rev. Lett. 122, 123601 (2019).

[2] F. van der Laan, R. Reimann, F. Tebbenjohanns, J. Vijayan, L. Novotny, and M. Frimmer, Observation of radiation torque shot noise on an optically levitated nanodumbbell, arXiv:2012.14231 (2020)

Quantum Sensing Group

Dr René Reimann

Quantum Sensors

Before Dr Rene joined the Technology Innovation Institute in 2020 he worked for 5 years as Senior Scientific Assistant in the group of Lukas Novotny at the Photonics Laboratory at ETH Zurich in Switzerland. His love for quantum optics and levitated particles is the common theme of his scientific work.

Dr Rene received his PhD in Physics in 2014 from the University of Bonn in Germany, where Dr Rene worked in the quantum technologies group of Dieter Meschede, on “Cooling and Cooperative Coupling of Single Atoms in an Optical Cavity”. In 2009 Dr Rene completed his Master in Physics at Stony Brook University in the United States, in the laboratory of Dominik Schneble, working on “Quantum Gases in State-Dependent Optical Potentials”.

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Dr Raquel Flores

Senior Researcher

Philip Verwegen

Junior Researcher

Open PhD and postdoctoral positions

We are looking for excellent PhD and postdoctoral candidates who would like to work in the experimental fields of applied quantum optics and optomechanics. We are offering a motivating, productive and inspiring environment in which our strong team targets our research challenges with cutting-edge technologies.
If we have sparked you interest, please contact
rene.reimann@tii.ae for further information.

Quantum Sensing Publications