Paper on Coherent Dynamics in Nanowires Published
In recent years, nanowire (NW) mechanical oscillators have emerged as a platform for force and mass sensing, with favorable properties that include a cantilever geometry, low mass, low mechanical dissipation, and high oscillation frequencies. In a paper published on the 30th by Physical Review Applied entitled, Coherent Two-Mode Dynamics of a Nanowire Force Sensor, we identify strong, highly tunable coupling between a NW’s two orthogonal modes, and use it to drive Rabi oscillations, showing the way to coherent two-mode control techniques for signal enhancement in force and mass sensing. Such techniques could be used to significantly reduce the frequency fluctuations of nanomechanical oscillators, or for innovative forms of noise spectroscopy.
The project was led and carried out by post-doc Dr. Floris Braakman with Ph.D. student Nicola Rossi working on the experiments. Former Ph.D. student Gözde Tütüncüoglu from the group of Prof. Anna Fontcuberta i Morral at EPFL grew the GaAs NWs used in the experiments.
Talk at Monte Verità
On the 28th, Prof. Poggio gave an invited talk at the Quantum Systems and Technology Workshop at the Monte Verità conference center in Ascona, Switzerland. The talk was entitled, “Quantum sensing with a SQUID-on-tip scanning probe”. The workshop covered a number of current topics in quantum science and technology including quantum sensing, quantum simulation, and quantum computation. In particular, several industrial and academinic groups updated the audience on their recent efforts to build 50-qubit quantum computers, with which they plan to achieve “quantum supremacy”, i.e. the demonstration that a quantum computer can be faster than the best classical computer for a certain computation.
Sinergia Meeting at PSI
On the 24th and 25th, a meeting of our Sinergia network took place at PSI in Villingen, Switzerland organized by Dr. Jonathan White. This network, entitled “Nanoskyrmionics”, is headed by Prof. Dirk Grundler (EPFL) and includes 3 other nodes, each led by a principal investigator: Dr. Jonathan White (PSI), Prof. Oleg Yazyev (EPFL), and Prof. Poggio (Basel). The collaboration aims to do materials discovery and nanoengineering of magnetic skyrmions. Ph.D. student Simon Philipp attended the workshop and the meeting on both days, giving a talk updating his progress to his fellow network members on the 24th. Ph.D student Giulio Romagnoli attended the meeting on the 25th.
Seminar at EPFL
On the 18th, Prof. Poggio visited the Department of Physics at the EPF Lausanne on the invitation of the Head of the Crystal Growth Facility, Dr. Arnaud Magrez. Dr. Magrez is part of our Sinergia network funded by the Swiss National Science Foundation. This collaboration, entitled “Nanoskyrmionics”, is headed by Prof. Dirk Grundler (EPFL) and includes 3 other nodes, each led by a principal investigator: Dr. Jonathan White (PSI), Prof. Oleg Yazyev (EPFL), and Prof. Poggio (Basel). Prof. Poggio gave a talk in the afternoon entitled, “New Scanning Probes for Nanomagnetic Imaging”.
Book on Micro and Nano Scale NMR Published
A book covering recent developments in the field of microscale nuclear magnetic resonance hardware and edited by Prof. Jens Anders (Stuttgart) and Prof. Jan Korvink (Karlsruhe) has just been published. Micro and Nano Scale NMR: Technologies and Systems is the first self-contained summary of recent developments in the field of microscale nuclear magnetic resonance hardware, covering the entire technology from miniaturized detectors, the signal processing chain, and detection sequences. Chapters cover the latest advances in interventional NMR and implantable NMR sensors, as well as in using CMOS technology to manufacture miniaturized, highly scalable NMR detectors for NMR microscopy and high-throughput arrays of NMR spectroscopy detectors. Former Ph.D. student Ben Herzog and Prof. Poggio contributed the final chapter, entitled “Force-Detected Nuclear Magnetic Resonance”.
Group Bike Tour
On Friday the 11th, the group went on a day-long bicycle tour of nearby Alsace, France. Starting from Colmar, we cycled through Ingersheim, Turckheim, Husseren-les-Châteaux, and stopped for a delicious lunch in at the Taverne Médiévale in Gueberschwihr. After lunch, we rode to Eguisheim, stopping for a drink and musical interlude before ending the tour back in Colmar. Over the course of what was a beautiful spring day, we discovered that whiskey is great for alleviating allergies, that Giulio cannot miss a rendezvous with an “important package”, and that snails taste really good. Thanks to Nicola Rossi for organizing the tour, to Marcus Wyss for finding and reserving the restaurant, and to all for the good times! Pictures and a movie can be found here.
Prof. Poggio in Zaragoza
On Monday and Tuesday the 7th and 8th, Prof. Poggio visited the National Laboratory for Advanced Microscopies (LMA) at the University of Zaragoza, Spain on the invitation of Prof. Jose María de Teresa. After tours of the facilities and various discussions regarding our ongoing collaborations, Prof. Poggio gave a seminar on Tuesday entitled, “New Scanning Probes for Nanomagnetic Imaging”.