A Rostami 2002 J. Opt. A: Pure Appl. Opt. 4 593 doi:10.1088/1464-4258/4/6/301
A Rostami
Show affiliationsWe show that the cut-off frequency (low corner frequency) for an undersized waveguide can change due to the photon tunnelling phenomenon. The Helmholtz wave equation will be used to calculate the tunnelling time of a photon through a refraction index barrier. We report an analytical expression for the transit time of the photon in a refraction index barrier as well as the transmission coefficient. It is predicted that the tunnelling time depends on the refraction index, the thickness of the barrier and also on the incident wave frequency. We will exploit this idea to obtain light coupling to a classically forbidden region, hence describing the cut-off frequency variation. A comparison with the experimental data is also reported.
42.79.Gn Optical waveguides and couplers
Issue 6 (November 2002)
Received 26 November 2001, in final form 1 August 2002
Published 13 September 2002
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