Effect of a photonic band gap in the optical range on solid-state SiO2 cluster lattices — opals

Three-dimensional ordered particulate structures: Method to retrieve characteristics from photonic band gap data

“…This agrees with the conclusions made in [44,45]. Opal particles have open and closed pores [44,45]. As one can see from Fig.…”

“…We consider its solution by an example of the particle refractive index retrieval. This problem arises, for example, when one creates colloidal crystals, synthetic opals [4,6,[44][45][46] and studies some biological objects [7][8][9].…”

“…However, some differences are observed. One of the reasons can be that the effective refractive index n n SiO 2 of particles in the experiment [45] depends, due to their porosity [44,45], on the immersion liquid. Therefore, the problem of determination of the effective refractive index of particles occurs.…”

“…Three-dimensional ordered systems of silica particlesartificial (synthetic) opals-are the objects of intensive researches in last decades (see [44][45][46] and references there in). The interest is caused by a number of properties of such structures enabling the creation of photonic crystals for visible spectrum.…”

Light-Induced Modification of 3D Photonic Band Structure Detected by Means of Photoreflection

“…It consists of uniform silica submicron globules close-packed usually with the symmetry of the face centered cubic type (f.c.c.). After appropriate treatment [7,8] this ordered ensemble of globules acquires a considerable mechanical durability. In this way macroscopic photonic crystals were made with following important properties: (i) they are entirely solid-state; (ii) they possess three-dimensional periodicity of the index of refraction; (iii) a characteristic size of structure unit (silica globule) is in the range of a few hundred nanometers that is relevant to the visible light wavelength.…”