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We investigate the emission of waves by a thin silver nanostrip placed into the center of a circular quantum wire (QWR), in the visible-light range. Our analysis uses the mathematically grounded approach called lasing eigenvalue problem (LEP). Keeping in mind that at the threshold the lasing-mode frequency is real valued (does not attenuate in time), the LEP is formulated as a boundary-value problem...
Presented are preliminary results related to two electromagnetic-wave problems: of the plane-wave scattering by a silver strip placed into a circular dielectric shell and of the wave emission by the same strip inserted into a quantum wire (QW), in the optical range. Auxiliary analysis is focused on the wavelength dependence of the total scattering cross-section of such resonant scatterer. Then we...
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