Nonlinear band gap transmission in optical waveguide arrays

被引:78
作者
Khomeriki, R [1 ]
机构
[1] Tbilisi State Univ, Dept Phys, 3 Chavchavadze Ave, GE-0128 Tbilisi, Georgia
关键词
D O I
10.1103/PhysRevLett.92.063905
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The effect of nonlinear transmission in coupled optical waveguide arrays is theoretically investigated and a realistic experimental setup is suggested. The beam is injected in a single boundary waveguide, linear refractive index of which (n(0)) is larger than refractive indexes (n) of other identical waveguides in the array. Particularly, the effect holds if omega(n(0)-n)/c>2Q, where Q is a linear coupling constant between array waveguides, omega is a carrier wave frequency, and c is a light velocity. Numerical experiments show that the energy transfers from the boundary waveguide to the waveguide array above a certain threshold intensity of the injected beam. This effect is due to the creation and the propagation of gap solitons in full analogy with a similar phenomenon in sine-Gordon lattice [F. Geniet and J. Leon, Phys. Rev. Lett. 89, 134102 (2002)].
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页数:4
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