PhD Position in Optomechanical Quantum Sensing

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The Degen 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 sensor that can detect a spin state within its coherence time, or 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 an optomechanical 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 (see string in picture). When approaching a tiny ferromagnetic tip to within 10-100 nm from the sample, the nuclear or electronic spins in the sample will feel a magnetic force. Although this force is minute, on the order of one attonewton, it leads to a slight mechanical force 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 spin states within their decoherence time. We will use novel ultra- sensitive mechanical membranes developed in the recent years to push the boundaries of scanning force microscopy, as well as explore quantum sensing techniques that have never been applied in the field of MRFM. We will also test our membrane resonators as mass sensors at the single-molecule resolution, and test various surface modifications to maximize the instrument performance.

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.

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In line with our values, ETH Zurich encourages an inclusive culture. We promote equality of opportunity, value diversity and nurture a working and learning environment in which the rights and dignity of all our staff and students are respected. Visit our Equal Opportunities and Diversity website to find out how we ensure a fair and open environment that allows everyone to grow and flourish.

We look forward to receiving your online application with the following documents:

Please note that we exclusively accept applications submitted through our online application portal. Applications via email or postal services will not be considered.

Further information about the Degen group can be found on our website. Questions regarding the position should be directed to Alexander Eichler, Tel. +41 44 633 22 61 or E-mail [email protected] (no applications).

ETH Zurich is one of the world's leading universities specialising in science and technology. We are renowned for our excellent education, cutting-edge fundamental research and direct transfer of new knowledge into society. Over 30,000 people from more than 120 countries find our university to be a place that promotes independent thinking and an environment that inspires excellence. Located in the heart of Europe, yet forging connections all over the world, we work together to develop solutions for the global challenges of today and tomorrow.

We look forward to receiving your online application with the following documents:

Please note that we exclusively accept applications submitted through our online application portal. Applications via email or postal services will not be considered.

Further information about the Degen group can be found on our website. Questions regarding the position should be directed to Alexander Eichler, Tel. +41 44 633 22 61 or E-mail [email protected] (no applications).

Apply online now

ETH Zurich is one of the world's leading universities specialising in science and technology. We are renowned for our excellent education, cutting-edge fundamental research and direct transfer of new knowledge into society. Over 30,000 people from more than 120 countries find our university to be a place that promotes independent thinking and an environment that inspires excellence. Located in the heart of Europe, yet forging connections all over the world, we work together to develop solutions for the global challenges of today and tomorrow.

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