MEASUREMENT OF THE GOOS-HÄNCHEN SHIFTS FOR A BOUNDED MICROWAVE BEAM IN A PMMA DOUBLE-PRISM SYSTEM

Min Qu , Zhixun Huang , Guizhen Lu, Rong Jiang

Abstract

It was in the microwave frequency range of 8.2 GHz to 12.4 GHz that a polymerhyl methacrylate(PMMA) Double-Prism system has been built. In this system, using a parabolic transmitter antenna and a wave-absorbing slab with a electrically large size slot, the finite-sized quasiparallel Guass beam as light wave can be guarenteed when incident source is sufficiently far. In consequence, discretely sampling from 9.25GHz to 12.25GHz, measured the Goos-Hänchen (GH) effect of total reflection beam for TM polarization at the air gap of width 4mm, where the frustrated internal total reflection(FITR) phenomenon has been realized, and at the air gap of width 20mm.,where the internal total reflection has not been destroyed. However, the observed values are not in agreement with theoretical predictions provided by Artmann. So, the nonideal nature of real world sources must be included for accurate interpretation of experimental results. Eventually, the measurement results have been successfully verified through the Fourier optics method of angular spectrum based on source edge diffraction considerations.

Keywords

microwave, FITR, Gauss beam, GH shifts, edge diffraction

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DOI

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IMEKO TC

TC2 - Photonics

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