Single photon emission of quantum emitters (QEs) carrying internal degrees of freedom such as spin and angular momentum plays an important role in quantum optics. Recently, QEs in two-dimensional semiconductors have attracted great interest as promising quantum light sources. However, whether those QEs are characterized by the same valley physics as delocalized valley excitons is still under debate. Moreover, the potential applications of such QEs still need to be explored. Here we show experimental evidence of valley symmetry breaking for neutral QEs in WSe monolayer by interacting with chiral plasmonic nanocavities. The anomalous magneto-optical behaviour of the coupled QEs suggests that the polarization state of emitted photon is modulated by the chiral nanocavity instead of the valley-dependent optical selection rules. Calculations of cavity quantum electrodynamics further show the absence of intrinsic valley polarization. The cavity-dependent circularly polarized single-photon output also offers a strategy for future applications in chiral quantum optics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10352360 | PMC |
| http://dx.doi.org/10.1038/s41467-023-39972-7 | DOI Listing |
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Article Synopsis
- Recent studies focus on creating hybrid systems of magnets and superconductors that exhibit topological superconductivity.
- The research demonstrates that using Floquet engineering with antiferromagnetic layers and s-wave superconductors can induce chiral topological superconductivity through light interaction that disrupts time-reversal symmetry.
- The ability to control these topological phases with elliptically polarized light offers a novel way to manipulate superconducting properties through related changes in valley pairs, making this approach promising for experimental exploration.
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