On-demand heralded MIR single-photon source using a cascaded quantum system
arxiv(2024)
Abstract
We propose a novel mechanism for generating single photons in the
mid-Infrared (MIR) using a solid-state or molecular quantum emitter. The scheme
utilises cavity QED effects to selectively enhance a Frank-Condon transition,
deterministically preparing a single Fock state of a polar phonon mode. By
coupling the phonon mode to an antenna, the resulting excitation is then
radiated to the far field as a single photon with a frequency matching the
phonon mode. By combining macroscopic QED calculations with methods from open
quantum system theory, we show that optimal parameters to generate these MIR
photons occur for modest light-matter coupling strengths, which are achievable
with state-of-the-art technologies. Combined, the cascaded system we propose
provides a new quasi-deterministic source of heralded single photons in a
regime of the electromagnetic spectrum where this previously was not possible.
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