Researchers at the University of Münster (Germany) have now developed an interface that couples light sources for single photons with nanophotonic networks. This interface consists of so-called photonic crystals, i.e. nanostructured dielectric materials that can enhance a certain wavelength range when light passes through. Such photonic crystals are used in many areas of research, but they had not previously been optimized for this type of interface. The researchers took particular care to achieve this feat in a way that allows for replicating the photonic crystals straightforwardly by using established nanofabrication processes.
"Our work shows that it is not only in highly specialized laboratories and unique experiments that complex quantum technologies can be produced," says physicist Dr. Carsten Schuck, an assistant professor at Münster University who headed the study together with Dr. Doris Reiter, likewise an assistant professor, who works in the field of solid state theory. The results could help to make quantum technologies scalable. The study has been published in the journal Advanced Quantum Technologies.
Background and method:
As single photons obey the laws of quantum physics, researchers talk of quantum emitters with respect to the light sources involved. For their study, the researchers considered quantum emitters which are embedded in nanodiamonds and emit photons when they are stimulated by means of electromagnetic fields. In order to produce the interfaces desired, the researchers' aim was to develop optical structures tailored to the wavelength of the quantum emitters.
Cavities - Holes - Crystals - Light - Minute
Cavities or holes in photonic crystals are well suited for trapping light in minute volumes and getting it to interact with matter such as, in this case, nanodiamonds. Jan Olthaus, a PhD student in physics in Doris Reiter's junior research group, developed theoretical concepts and special computer-assisted simulation techniques in order to compute the designs for these photonic crystals.
The theoretically developed designs were produced by physicists...
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