Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain.
Opt Lett. 2010 Jun 15;35(12):2097-9. doi: 10.1364/ol.35.002097.
We consider a waveguide array in which defect channels with reduced refractive index are spaced periodically and the light guiding is achieved because of Bragg reflection. We show that tunneling between defects can be inhibited using out-of-phase longitudinal modulation of refractive index exclusively in defect channels. Tunneling inhibition is almost perfect for strongly localized modes with propagation constants close to the gap center.
我们考虑了一种波导阵列，其中具有较低折射率的缺陷通道周期性地间隔开，并且由于布拉格反射而实现光导。我们表明，仅在缺陷通道中进行折射率的反相信号纵向调制就可以抑制缺陷之间的隧道。对于传播常数接近间隙中心的强局域模式，隧道抑制几乎是完美的。
