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The dispersion item HT ht of Ag is 284.1. Both of them consist of Bessel functions in the radial direction and a phase factor of HT ht that couples the azimuthal and vertical directions. Furthermore, we plot HT ht and | B E b | at a height of 1550 nm above the cavity in Figure 3(e) and (f). Clearly, the backscattering is unidirectional when HT ht equals HT ht , with HT ht but HT ht . [Extracted from the article]

In recent years, the controlled coupling of single-photon emitters to propagating surface plasmons has been intensely studied, which is fueled by the prospect of a giant photonic nonlinearity on a nanoscaled platform. In this article, we will review the recent progress on coupling single emitters to nanowires towards the construction of a new platform for strong light-matter interaction. The control over such a platform might open new doors for quantum information processing and quantum sensing at the nanoscale and for the study of fundamental physics in the ultrastrong coupling regime. [ABSTRACT FROM AUTHOR]