PhD Position in Optomechanical Quantum Sensing

The Spin Physics group at the Solid State Institute of ETH Zurich is looking for a highly motivated PhD student to join us in our nanomechanical sensing team. Do you have a broad interest in physics and technology? Are you willing to learn about many topics, including optomechanics, radio frequency electronics, magnetism, laser optics, nuclear magnetic resonance, low temperature physics, vacuum technology, digital signal analysis, and pulse sequence programming? Are you persevering, independent, and a good team player? Get in touch with us!

You can expect a cutting-edge research project that is very challenging due to the many aspects of science and technology that are involved. For the same reason, it is a highly rewarding experience if you enjoy expanding your knowledge beyond textbook physics. We look forward to meeting you!

Is it possible to build a microscope that can look below surfaces and image materials and molecules with atomic resolution in three dimensions? In our group we try to realize exactly that using a nanomechanical force sensor.

The magnetic resonance force microscope (MRFM) is an ultrasensitive variety of the atomic force microscope (AFM): A nanoscale sample, such as a large biomolecule, is placed on a micromechanical sensor made from silicon nitride. When approaching a tiny ferromagnetic tip to within 10-100 nm from the sample, each nuclear or electronic spin in the sample will feel a magnetic force. Although this force is minute, on the order of 1e-18 N (one attonewton) or below, it leads to a slight mechanical push on the sensor. Through magnetic resonance pulses, the state of the spin can be periodically inverted to generate resonant oscillations of the mechanical sensor that can be precisely measured by laser interferometry.

The position we are announcing now will merge state-of-the-art quantum cavity optomechanics and ultrasensitive force microscopy, with the aim of detecting individual nuclear spins. To do so, we will explore techniques that have never before been considered for scanning force microscopy. The project will therefore involve extensive instrument design and testing, followed by demonstrating record sensitivity and novel capability in various vacuum and cryogenic setups.

The ideal candidate for this position has a degree in physics and pritor experience in experimental cavity optomechanics, force sensing, nanophotonics, or magnetic resonance. We are searching for an independent, open-minded, and highly motivated researcher with a pragmatic approach to overcoming challenges.

ETH Zurich is a family-friendly employer with excellent working conditions. You can look forward to an exciting working environment, cultural diversity and attractive offers and benefits.