Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
Opt Lett. 2009 Nov 15;34(22):3544-6. doi: 10.1364/OL.34.003544.
We address light propagation in couplers with longitudinal biharmonic modulation of refractive index in neighboring channels. While simplest single-frequency out-of-phase modulation allows suppression of coupling for a strictly defined set of resonant frequencies, the addition of modulation on multiple frequencies dramatically modifies the structure of resonances. Thus, additional modulation on a double frequency may suppress the primary resonance, while modulation on a triple frequency causes fusion of primary and secondary resonances.
我们研究了具有相邻通道折射率双谐波调制的耦合器中的光传播。虽然最简单的单频反相调制允许在严格定义的一系列共振频率下抑制耦合，但多个频率的调制的添加则显著改变了共振的结构。因此，在双频上的额外调制可能会抑制主共振，而在三频上的调制则会导致主共振和次共振的融合。
