Browsing by Author "Bravo-Abad, J."
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Item Enhanced millimeter wave transmission through quasioptical subwavelength perforated plates(2005-06) Beruete, Miguel; Sorolla, Mario; Campillo, I.; Dolado, J. S.; Martín-Moreno, Luis; Bravo-Abad, J.; García-Vidal, F. J.; Tecnalia Research & InnovationIn this paper, we show that the phenomenon of extraordinary transmission through arrays of subwavelength holes, present in the optical regime, is also present in the millimeter wave range. After presentation of the theoretical foundations of the enhanced transmission, measurements of the transmission response have been performed on different samples by using a millimeter wave quasioptical vector network analyzer in the range between 45 and 110 GHz. The prototypes have been fabricated in Aluminum plates with several thickness and different hole diameters drilled by using a laser machine. Good agreement between theory and experiment is obtained, with clear signals of the existence of resonant transmission at wavelengths close to the period of the array. Possible applications in frequency selective surfaces and near-field imaging are envisaged.Item Enhanced millimeter-wave transmission through subwavelength hole arrays(2004-11-01) Beruete, M.; Sorolla, M.; Campillo, I.; Dolado, J. S.; Martín-Moreno, L.; Bravo-Abad, J.; García-Vidal, F. J.; Tecnalia Research & InnovationWe explore, both experimentally and theoretically, the existence in the millimeter-wave range of the phenomenon of extraordinary light transmission through arrays of subwavelength holes. We have measured the transmission spectra of several samples made on aluminum wafers by use of an AB Millimetre quasi-optical vector network analyzer in the wavelength range 4.2-6.5 mm. Clear signals of the existence of resonant light transmission at wavelengths close to the period of the array appear in the spectra.