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Periodic structures possess a specific feature, there is a set of high quality resonances near to the wavelength equal to the grating period and their Q-factors rise higher if the grating becomes sparser. Making a grating from silver elements brings other resonances - surface-plasmon ones appearing in the visible-light band. We investigate interaction between the grating and the plasmon resonances...
In this paper, we study the scattering and eigenvalue problems for a periodic open optical resonator that is an infinite chain of active circular cylindrical quantum wires standing in free space. The scattering problem is solved by the method of partial separation of variables. The eigenvalue problem differs from the first one by the absence of the incident field and presence of ldquoactive propertiesrdquo...
In this paper we investigate an analytical-numerical approach to the modelling of the lasing modes of a periodic open optical resonator. The resonator is an infinite chain of dielectric circular cylindrical quantum wires standing in free space, with negative imaginary part of refractive index. The lasing eigenvalue problem is reduced to a determinantal characteristic equation for the frequencies and...
The optical theorem (OT) is a classical identity, which links the extinction cross-section and the forward-direction far field for a particle illuminated with a monochromatic plane wave. We discuss the application of the similar identity to the lasing modes of an open dielectric microcavity containing an active region, i.e. a laser. This yields clear insight into the lasing thresholds of individual...
We discuss the application of the optical theorem to the analysis of lasing as a linear eigenvalue problem. This yields clear insight into the lasing thresholds of individual modes and easily accounts for the matching of the active-region geometry with the modal electric-field pattern.
In this paper, we study the lasing modes of a periodic open optical resonator. The resonator is an infinite chain of active circular cylindrical quantum wires standing in free space. Characteristic equations for the frequencies and associated linear thresholds of lasing are derived. These quantities are considered as eigenvalues of specific electromagnetic-field problem with ldquoactiverdquo imaginary...
Thresholds of lasing for a cavity with a quantum well placed between two distributed Bragg reflectors are investigated as a specific eigenvalue problem with "active" imaginary part of the quantum well refractive index. The characteristic equation is obtained from the transmission-matrix formalism. Preliminary results show that the frequencies of lasing are determined mainly by the size and...
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