Using modern nanotechnology, it is possible nowadays
to produce structures which have a feature sizes of just a few
nanometres. This world of the most minute particles—also known as
quantum systems—makes possible a wide range of technological
applications, in fields which include magnetic field sensing,
information processing, secure communication or ultra-precise time
keeping. The production of these microscopically small structures
has progressed so far that they reach dimensions below the
wavelength of light. In this way, it is possible to break down
hitherto existent boundaries in optics and utilize the quantum
properties of light. In other words, nanophotonics represent a
novel approach to quantum technologies.
