New photonic crystal method improves single-photon sources for quantum networks
Quantum communication promises many advantages over today's standard technologies, including absolutely secure transmission of large amounts of data. However, it requires single photons—and generating them is very difficult. Researchers at the Technical University of Munich (TUM) and the Munich Center for Quantum Science and Technology (MCQST) have developed a new method that overcomes the…
Researchers at the Technical University of Munich and the Munich Center for Quantum Science and Technology have developed a new method for improving single-photon sources for quantum networks. This innovative photonic crystal waveguide approach selectively suppresses unwanted frequencies, rather than amplifying the desired ones, as previous methods have done.
By using photonic crystal waveguides, the team was able to increase the proportion of desired photons in emitted light from around 23% to 72%, significantly improving upon previous techniques. The new method also allows for the simultaneous use of multiple photon sources and offers more flexible frequency selection, making it a promising development for quantum communication technology.
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