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计算了厚度调制的双周期一维光子晶体的能带.当一维光子晶体的厚度被周期性地调制时,原来的能带分裂为许多子能带,其中一些很窄的子能带进入了原来的单周期光子晶体的带隙内.这些窄带内的电磁模的场强具有双周期性分布的特点,并有较强的局域性.在较宽的子能带中的电磁模是扩展的.
The energy band of a two-period one-dimensional photonic crystal with thickness modulation is calculated. When the thickness of a one-dimensional photonic crystal is periodically modulated, the original energy band splits into many sub-bands and some of the narrow sub-bands enter The original single-period photonic crystal bandgap in these narrow-band electromagnetic mode field strength has the characteristics of a double periodic distribution, and has a strong locality in the wider sub-band electromagnetic module is extended of.