The present work is devoted to simulation of photonic and magnetophotonic bandgap structures/crystals intended for various applications, particularly in the telecommunications in the GHz, THz to optical frequency bands (as waveguides, beam-guides, filters etc).
The results of experimental and theoretical study of several types of 1 D photonic crystals are discussed. Structures under study are presented by periodical multilayered systems formed with: 1st type--ferrite/quartz and 2nd type--quartz/teflon/thin-film-bismuth and ruby/teflon/thin-film-copper. Theoretical predictions are fulfilled for a wide frequency band. The experimental verification of these the modeling results was performed in the EHF band (20-40 GHz).
The possibility to control the shape of frequency stop-band zones has been modeled by using magnetically sensitive thin films forming the periodical structure of the 2nd type. It was demonstrated that the shape of the stop bands of the given magnetophotonic structure can be changed effectively by applying a magnetic field not exceeding 100 Oe. Various promising applications of these structures such as tunable extra high frequency and optical passive devices are discussed.
The experimental and numerical calculation results of nonlinear properties of quasioptical magnetoresonance structure in nonstationary regime are presented. The theoretical analysis has been carried out for the system of planeparal1e1 paramagnetic layers under the electron spin resonance (ESR) conditions at low temperatures (T 4.2 K).Such space is placed between two plane metal mirrors. The experimental results were Obtained by using a two-mirror quasioptical resonator with the paramagnetic layer inside it. Experiments were carried out in 4-mm wavelength range and at radiophysical low and superlow temperatures T< 1 K. Analytic theoretical studying of the development of the process of paramagnetic resonance absorption taking into account the influence of such spin system on the nonlinear properties of the structure under investigation is presented too. The comparison of experimental results with the theoretical date allows to conclude that we have qualitative agreement of the mathematical model and real situation.
The operation principle of the optical transistor is based on the optical bistability phenomenon and inversionless (differential) amplification in the passive Fabry-Perot resonator (OR), filled with a substance having non-linear adsorption or refraction. In the millimeter wave range such resonator with a paramagnetic saturated by the UHF field under the ESR conditions is used to reach the similar purposes. In the paper the results of experimental and theoretical investigations of the non-linear OR (quasi-optical ESR-cell) with the ruby layer in 4-millimeter wave range at the temperatures T
Excitation of surface magnetoplasma waves in the CdHg1Te semiconductors
has been effected by the method of disturbed total internal
reflection following the Otto scheme at the wavelength of 2 mm, in
the temperature range 0.3 KT<77 k. The temperature dependence of
measured surface characteristics in the semiconductors are discussed
as well as their interplay with similar volume ones.