Nuclear magnetic resonance spectroscopy – NMR spectroscopy for short – is one of the most important methods of physicochemical analysis. It can be used to precisely determine molecular structures and dynamics. The importance of this method is also evidenced by the recognition of ETH Zurich’s two latest Nobel laureates, Richard Ernst and Kurt Wüthrich, for their contributions to refining the method.
- The research alliance between Zurich and Karlsruhe is now united in the new Centre of Atomic Scale Technologies.
- We have recently developed a novel technique that avoids these drawbacks and allows for the direct and complete imaging of microwave magnetic fields with high spatial resolution .
- The new chip will be 100 times smaller than standard CMOS chips, yet able to process at least as much data while consuming much less energy.
- This nanoscale dance of atoms can thus be observed as orange and red flashes of fluorescence, which are signatures of atoms undergoing rearrangements.
- Unlike stars and galaxies, dark matter does not emit any light or electromagnetic radiation of any kind, so that we can detect it only through its gravitational effects.
and thus the spatial distribution of the microwave magnetic field component Bγ by measuring p2 for different values of the microwave power Pmw, see Figure 3 and .
Mobile phones and laptops, for example, are equipped with integrated microwave circuits for wireless communication and satellite navigation. In the design and development of these circuits, computer simulations play an important role. However, because of the large number of components in modern integrated circuits, such simulations have to rely on approximations and are not always reliable. Therefore, measurements are required to test the circuits and to verify their performance. To enable efficient testing and specific improvement, one would ideally like to measure all components of the microwave field directly and with very high spatial resolution.
Ultracold atoms react very sensitively to applied electromagnetic fields. Moreover, because all atoms of a given species are the same and their properties are well-known, these atomic sensors are calibrated by nature. The use of atomic gases for precision measurements has a long tradition in the field of spectroscopy and atom interferometry .
“We’ll need even smaller and more efficient chips in future, meaning a fundamentally new technology is necessary,” says Professor Jürg Leuthold, head of the Institute of Electromagnetic Fields at ETH Zurich. Chips that are 100 times smaller and 100 times more energy efficient—while at least retaining the current speed of data processing. From p2 we can reconstruct
Molecule Synthesis By Atom Manipulation
Au cation switch that can be used to toggle the local electrostatic field .
Welcome To The Quantum Optics Lab
More recently, atoms were used for the high-resolution imaging of static magnetic and electric fields near a chip surface . Our technique demonstrates the usefulness of ultracold atomic sensors for measurements of electromagnetic fields with high sensitivity and high spatial resolution. Naturally, further development is necessary before it could be used in commercial applications. In particular, it is highly desirable to further miniaturize and simplify the experimental setup required to produce and manipulate clouds of ultracold atoms. In recent years, significant progress has been made along these lines. Compact and portable systems for the preparation of ultracold atoms have been built , and key components of such systems are now commercially available.