Photonic dispersions of semiconductor-quantum-dot-array-based photonic crystals in primitive and face-centered cubic lattices
✍ Scribed by Y Fu; M Willander; E.L Ivchenko
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 164 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
We study the energy dispersions of photonic crystals based on the semiconductor-quantumdot arrays. It has been shown that for the most commonly used semiconductor materials, and as compared with the primitive cubic lattice, the photonic crystal in a face-centered cubic (fcc) lattice exhibits a very promising energy dispersion relationship with an overall photonic bandgap. The bandgap is most prominent along the ( -L) line in q space. The results explain the difficulties in fabricating photonic crystals in fcc lattices. They explain also the experimental works of Vlasov et al. [Physical Review B55, R13357-13360 (1997)], where it has been demonstrated that for CdS nanocrystals embedded in fcc porous silica matrices the photonic bandgaps are observed for any direction of the radiation incidence, being most pronounced for the [111] direction.