Peculiarities of photonic band gap width dependence upon concentration of the admixture layers randomly included in composite material

• Дата: 2008
• Автори: Rumyantsev, V.V., Fedorov, S.A., Shtaerman, E.Ya.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2008
• Назва видання: Functional Materials
• Теми: Modeling and simulation
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/134544
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Peculiarities of photonic band gap width dependence upon concentration of the admixture layers randomly included in composite material // V.V. Rumyantsev, S.A. Fedorov, E.Ya. Shtaerman // Functional Materials. — 2008. — Т. 15, № 2. — С. 223-228. — Бібліогр.: 9 назв. — англ.

Considered is a model of photonic crystalline superlattice as a set of macroscopically homogeneous layers with randomly included extrinsic (with respect to the ideal superlattice) layers of a variable thickness and composition. The polariton spectrum of such a non-ideal superlattice with an arbitrary number of layers per elementary cell obtained within the virtual crystal method is specified for the Si - diamond crystal system. The peculiarities of the band gap width dependence upon concentration of admixture layers and refractive index are considered. The study carried out shows that optical characteristics of a crystalline superlattice may vary significantly due to transformation of its polariton spectrum caused by the presence of admixture layers.