Quantum dots coupled to high-Q cavities can induce optical transparency that provides photon switching capabilities. However, the optical access to such cavities can be inefficient due to their restrictive optical modes. Here, we observe optical transparency of ∼ 80% induced by a quantum dot coupled to a cavity with an efficient optical access, the low-Q bullseye cavity, due to the destructive interference of reflected light. Together with optical lifetimes of quantum dots as short as 80 ps, and the coherent manipulation capabilities of their spin, the transparency induced by coupling these dots to bullseye cavities makes them promising for quantum technologies.
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