Wazwaz, Abdul-MajidAlbalawi, WedadEl-Tantawy, S. A.
7页
查看更多>>摘要：In this work, a two coupled nonlinear Schrodinger equation (CNLSE) which is applicable to high birefringence fibers is investigated. We operate a variety of ansatze to derive a variety of bright and dark optical envelope soliton solutions. Also, other solutions of distinct structures, periodic, exponential, and singular, are derived. This analysis shows the pertinent contribution of nonlinear terms to both pulse compression feature and nonlinear birefringence phenomena.
查看更多>>摘要：A novel fractal metamaterial absorber for millimeter-wave bolometers has been proposed in this paper. The proposed absorber is based on a second-order-modified-Sierpinski-carpet array on a silicon wafer. The efficiency of a bolometer is directly proportional to bandwidth and inversely proportional to the thickness of the absorber layer; therefore, the goal of this work was to realize thin-wideband-absorber layer for millimeter waves. The use of a modified Sierpinski-carpet in place of standard Sierpinski-carpet fractal results in a much wider absorption bandwidth compared to other millimeter wave absorbers reported in the literature. The absorber was simulated in HFSS (High Frequency Structure Simulation). For normal incidence, the absorber has more than 84% absorption for the frequency band of 100-1000 GHz, for both the polarizations. The proposed absorber has a thickness of 0.3 mm, i.e., only 0.1 lambda at 100 GHz. The absorber has a wide absorption bandwidth for oblique incidence as well. The absorber can be realized by simply patterning a 1 ohm-cm silicon wafer. The design concept can also be extended to other frequency bands, as has been demonstrated in this paper.
NSTL
Elsevier