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A one-dimensional periodic structure is the simplest type of photonics crystal and any such one-dimensional system has a band-gap?
My textbook says the following:
A one-dimensional periodic structure, such as a multilayer film (a Bragg mirror), is the simplest type of photonics crystal, and Lord Rayleigh showed that any such ...
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Is the huge calcite birefringence accounted for by first principles?
The birefringence in calcite is huge (possibly the largest?). The question is, why is it so special? why is such kind of materials so rare?
In other words, is it explained by first principles?
By ...
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