The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The parameters of pulses reflected from non-periodic Bragg layered structures have been investigated. The specific structures such as asymmetric resonators with periodic Bragg reflectors and structures with chirp variation of the thickness of the “period” have been examined. The numerical investigations have been made both in Bragg band and outside it. The frequency characteristics of the structures...
The time delays of pulses reflected from periodic and non-periodic Bragg layered structures have been investigated. The specific structures such as Bragg reflectors and structures with chirp variation of thickness of the “period” have been considered. The calculation has been carried out under the conditions that carrier frequency is in the vicinity of the Bragg resonance values. The parameters of...
We present the theoretical and experimental studies of the giant Goos-Hanchen effect and the effect of focusing of light beam in one-dimensional photonic crystals with spatial modulation of photonic band gap position. We show that the photonic crystal with slow exponentially modulated band gap applies the second-order phase modulation to the reflected light and can focus or defocus the light beam.
The analysis of the natural frequency and estimation of Q-factor of the open resonator by means of fractional-rational approximation of the reflection response has been considered. An advantage of the proposed technique in comparison with the classical methods has been demonstrated. Dependence of Q-factor of the shielded half-disk dielectric resonator and estimations of the poles and the zeros of...
Localization of plane wave decomposition for the analysis of transverse-inhomogeneous structures has been considered. The algorithm of numerical implementation of local plane wave decomposition on the basis of parametric spectral analysis is offered. Its advantage over algorithm based on the discrete Fourier transform has been shown for the analysis of reflection from the secondary aperture.
The problem of selection of convenient model of wideband frequency response of open resonance structures was examined. Importance of influence of the quasi-resonance effects on formation of resonance curve is demonstrated. For quasi-resonance accounting the square root singularity was used.
As frequency-selective devices for millimeter and submillimeter waves, open resonators are widely used. Selective properties of open resonators are defined by their frequency response. In many cases it is convenient to use model for representation of the frequency response of the open resonator. For example, utilization of model considerably simplifies search of complex natural frequencies of the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.