Limitations in design and applications of ultra-small mode volume photonic crystals
New Journal of Physics(2024)
摘要
Ultra-small mode volume nanophotonic crystal cavities have been proposed as
powerful tools for increasing coupling rates in cavity quantum electrodynamics
systems. However, their adoption in quantum information applications remains
elusive. In this work, we investigate possible reasons why, and analyze the
impact of different low mode volume resonator design choices on their utility
in quantum optics experiments. We analyze band structure features and loss
rates of low mode volume bowtie cavities in diamond and demonstrate independent
design control over cavity-emitter coupling strength and loss rates. Further,
using silicon vacancy centers in diamond as exemplary emitters, we investigate
the influence of placement imprecision. We find that the benefit on photon
collection efficiency and indistinguishability is limited, while the
fabrication complexity of ultra-small cavity designs increases substantially
compared to conventional photonic crystals. We conclude that ultra-small mode
volume designs are primarily of interest for dispersive spin-photon
interactions, which are of great interest for future quantum networks.
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关键词
photonic crystal,ultra-small mode volume,nanophotonics,cavity qed,quantum networks
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