Optical diagnostics of defects in laminated periodic nanostructures

The purpose of this work is to study the features of the properties of a plane wave incident on a layered and periodic medium with an embedded defective layer. The relevance of the study of photonic crystals is due to the fact that this area of modern materials science is widely developing in the world of science. A confirmation of the large growth in development is the specificity of the versatile application and implementation of photonic crystals. For example, it becomes possible to create digital computing devices based on photonics. The possibility of creating new types of lasers with the lowest lasing threshold, high-efficiency LEDs, optical switches, and light guides is also not ruled out. The uniqueness of photonic crystals lies in their structure, the properties of which have a periodic change in the refractive index. These crystals, due to their peculiarity, do not transmit light with a wavelength comparable to the time of the crystal structure, since they remain transparent for a wide range of electrical radiation. Formulas for the energy reflection and transmission coefficients for layered, periodic media are derived and calculated. A basic component of a computer program for calculating the reflection and transmission coefficients of layered nanostructures has been developed. An analysis was made of an interstitial layer, in this case a defect, in a periodic layered structure such as a photonic crystal.