Cut-off frequency variation in optical waveguides due to photon tunnelling

被引：0

作者：

Rostami, A ^{[1
]}

机构：

[1] Tabriz Univ, Fac Engn, Dept Elect Engn, Tabriz 51664, Iran

来源：

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 2002年 / 4卷 / 06期

关键词：

photon tunnelling; cut-off frequency; waveguide;

D O I：

10.1088/1464-4258/4/6/301

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We 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.

引用

页码：593 / 597

页数：5

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