ICFO-Institut de Ciencies Fotoniques and Universitat Politecnica de Catalunya, Mediterranean Technology Park,08860 Castelldefels (Barcelona), Spain.
Opt Lett. 2010 Jan 15;35(2):205-7. doi: 10.1364/OL.35.000205.
We consider light tunneling inhibition in a periodic array of optical couplers due to the specially designed longitudinal and transverse modulation of the refractive index. We show that local out-of-phase longitudinal modulation of refractive index in channels of directional couplers in combination with the global refractive index modulation between adjacent couplers allow simultaneous suppression of both local and global energy tunneling inside each coupler and between adjacent couplers. This enables the localization of light in single waveguide despite the remarkable difference of corresponding local and global energy tunneling rates.
我们考虑了由于折射率的特殊纵向和横向调制而导致的周期性光耦合器阵列中的光隧穿抑制。我们表明，定向耦合器通道中折射率的局部反相纵向调制与相邻耦合器之间的全局折射率调制相结合，允许同时抑制每个耦合器内部和相邻耦合器之间的局部和全局能量隧穿。这使得尽管相应的局部和全局能量隧穿率有很大差异，但仍能将光局限在单波导中。
