Two-photon spontaneous emission in atomically thin plasmonic nanostructures
arXiv:2006.15219 · doi:10.1103/PhysRevLett.125.033601
Abstract
The ability to harness light-matter interactions at the few-photon level plays a pivotal role in quantum technologies. Single photons - the most elementary states of light - can be generated on-demand in atomic and solid state emitters. Two-photon states are also key quantum assets, but achieving them in individual emitters is challenging because their generation rate is much slower than competing one-photon processes. We demonstrate that atomically thin plasmonic nanostructures can harness two-photon spontaneous emission, resulting in giant far-field two-photon production, a wealth of resonant modes enabling tailored photonic and plasmonic entangled states, and plasmon-assisted single-photon creation orders of magnitude more efficient than standard one-photon emission. We unravel the two-photon spontaneous emission channels and show that their spectral line-shapes emerge from an intricate interplay between Fano and Lorentzian resonances. Enhanced two-photon spontaneous emission in two-dimensional nanostructures paves the way to an alternative efficient source of light-matter entanglement for on-chip quantum information processing and free-space quantum communications.
13 pages, 4 figures
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Cited by in corpus (8)
- Space-Time Quantum Metasurfaces
- Strong multipolar transition enhancement with graphene nanoislands
- Aperiodic bandgap structures for enhanced quantum two-photon sources
- Chiral Light-Matter Interactions with Thermal Magnetoplasmons in Graphene Nanodisks
- Enhancing two-photon spontaneous emission in rare earths using graphene and graphene nanoribbons
- Two-photon spontaneous emission of an atom in a cosmic string background
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