Spectral multiplexing of telecom emitters with stable transition
frequency
- URL: http://arxiv.org/abs/2110.09409v2
- Date: Fri, 28 Oct 2022 06:59:56 GMT
- Title: Spectral multiplexing of telecom emitters with stable transition
frequency
- Authors: Alexander Ulanowski, Benjamin Merkel, Andreas Reiserer
- Abstract summary: coherent emitters can be entangled over large distances using photonic channels.
We observe around 100 individual erbium emitters using a Fabry-Perot resonator with an embedded 19 micrometer thin crystalline membrane.
Our results constitute an important step towards frequency-multiplexed quantum-network nodes operating directly at a telecommunication wavelength.
- Score: 68.8204255655161
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In a quantum network, coherent emitters can be entangled over large distances
using photonic channels. In solid-state devices, the required efficient
light-emitter interface can be implemented by confining the light in
nanophotonic structures. However, fluctuating charges and magnetic moments at
the nearby interface then lead to spectral instability of the emitters. Here we
avoid this limitation when enhancing the photon emission up to 70(12)-fold
using a Fabry-Perot resonator with an embedded 19 micrometer thin crystalline
membrane, in which we observe around 100 individual erbium emitters. In
long-term measurements, they exhibit an exceptional spectral stability of < 0.2
MHz that is limited by the coupling to surrounding nuclear spins. We further
implement spectrally multiplexed coherent control and find an optical coherence
time of 0.11(1) ms, approaching the lifetime limit of 0.3 ms for the
strongest-coupled emitters. Our results constitute an important step towards
frequency-multiplexed quantum-network nodes operating directly at a
telecommunication wavelength.
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