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Research Group Theory of Condensed Matter in the Institute for Theoretical Physics and Zernike Institute for Advanced Materials, University of Groeningen, Nijenborg 4, NL 9747 AG Groeningen, Netherlands
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- PublicationOpen AccessQuasi-normal-modes description of transmission properties for photonic bandgap structures(2009-03-31)
; ; ; ;Settimi, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Severini, S.; Centro Interforze Studi per le Applicazioni Militari (CISAM), via della Bigattiera 10, 56010 San Pietro a Grado (Pi), Italy ;Hoenders, B. J.; Research Group Theory of Condensed Matter in the Institute for Theoretical Physics and Zernike Institute for Advanced Materials, University of Groeningen, Nijenborg 4, NL 9747 AG Groeningen, Netherlands; ; We use the “quasi-normal-modes” (QNM) approach for discussing the transmission properties of double-side opened optical cavities: in particular, this approach is specified for one-dimensional (1D) “photonic bandgap” (PBG) structures. Moreover, we conjecture that the density of the modes is a dynamical variable that has the flexibility of varying with respect to the boundary conditions as well as the initial conditions; in fact, the electromagnetic (e.m.) field generated by two monochromatic counterpropagating pump waves leads to interference effects inside a quarter-wave symmetric 1D-PBG structure. Finally, here, for the first time to the best of our knowledge, a large number of theoretical assumptions on QNM metrics for an open cavity, never discussed in literature, are proved, and a simple and direct method to calculate the QNM norm for a 1D-PBG structure is reported.471 225