纵向调制分段波导阵列中的动态光控制
Dynamical light control in longitudinally modulated segmented waveguide arrays
摘要：
我们解决光在分段波导阵列中的传播，其中折射率在相邻波导中被纵向调制，从而耦合强度沿传播方向变化。因此，在谐振段中，耦合可以被抑制，因此光保持局部化，而在失谐段中，耦合导致复杂的切换场景，其可以通过堆叠几个谐振和非谐振段来控制。通过调谐调制频率和波导段的长度，可以控制光在输出波导中的分布，包括将所有光定位在所选输出通道中。
英文摘要：
We address light propagation in segmented waveguide arrays where the refractive index is longitudinally modulated with an out-of-phase modulation in adjacent waveguides, so that the coupling strength varies along propagation direction. Thus in resonant segments coupling may be inhibited hence light remains localized, while in detuned segments coupling results in complex switching scenarios that may be controlled by stacking several resonant and nonresonant segments. By tuning the modulation frequency and lengths of waveguide segments one may control the distribution of light among the output guides, including loca-lizing all light in the selected output channel.
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