Resonant freak microwaves |
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Authors: | FM de Aguiar |
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Institution: | Departamento de Física, Universidade Federal de Pernambuco, Recife, PE 50670-901, Brazil |
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Abstract: | The Helmholtz equation describing transverse magnetic modes in a closed flat microwave resonator with 60 randomly distributed discs is numerically solved. At lower frequencies, the calculated wave intensity spatially distributed obeys the universal Porter-Thomas form if localized modes are excluded. A superposition of resonant modes is shown to lead to rare events of extreme intensities (freak waves) at localized “hot spots”. The temporally distributed intensity of such a superposition at the center of a hot spot also follows the Porter-Thomas form. Branched modes are found at higher frequencies. The results bear resemblance to recent experiments reported in an open cavity. |
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Keywords: | Freak waves Microwave resonators Disordered media |
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