Surface plasmons（SPs） in ultraviolet（UV） have attracted a great deal of attention because of their emerging applications in energy resources, environmental protection, and biotechnology. In this article, the diele...Surface plasmons（SPs） in ultraviolet（UV） have attracted a great deal of attention because of their emerging applications in energy resources, environmental protection, and biotechnology. In this article, the dielectric loaded surface plasmon polariton（DLSPP） properties of the Al2O3–Al nanostructure are investigated theoretically. Sharp SP responses can be obtained in deep UV by setting an insulator grating on the aluminum film. It is found that the height of the grating element,the lattice parameter, and the filling factor can all modulate the DLSPPs of the Al2O3–Al nanostructure. We further find that this structure is sensitive to the embedding medium and can serve as a refractive index sensor in the UV region. The corresponding sensitivity increases with the decrease of the filling factor. The Al2O3–Al nanostructure may be useful for medical diagnostics and biotechnology in deep UV.展开更多
In the present paper, we carried out a theoretical study of dielectric barrier discharge（DBD）filled with pure methane gas. The homogeneous discharge model used in this work includes a plasma chemistry unit, an elect...In the present paper, we carried out a theoretical study of dielectric barrier discharge（DBD）filled with pure methane gas. The homogeneous discharge model used in this work includes a plasma chemistry unit, an electrical circuit, and the Boltzmann equation. The model was applied to the case of a sinusoidal voltage at a period frequency of 50 kHz and under a gas pressure of 600 Torr. We investigated the temporal variation of electrical and kinetic discharge parameters such as plasma and dielectric voltages, the discharge current density, electric field, deposited power density, and the species concentration. We also checked the physical model validity by comparing its results with experimental work. According to the results discussed herein, the dielectric capacitance is the parameter that has the greatest effect on the methane conversion and H_2/CH_4 ratio. This work enriches the knowledge for the improvement of DBD for CH_4 conversion and hydrogen production.展开更多
The effect of dielectric constant contrast and the filling factor to the photonic bandgap in a 2-D square lattice photonic crystal is discussed. The location, width and number of photonic bandgap can be modulated.
基金Project by the National Natural Science Foundation of China(Grant Nos.11674175,51120125001,and 11474166)the Major Project of Natural Science Research for Colleges and Universities in Jiangsu Province,China(Grant No.15KJA140002)+1 种基金the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20150562)the Priority Academic Program Development of Jiangsu Provincial Higher Education Institutions,China
文摘Surface plasmons（SPs） in ultraviolet（UV） have attracted a great deal of attention because of their emerging applications in energy resources, environmental protection, and biotechnology. In this article, the dielectric loaded surface plasmon polariton（DLSPP） properties of the Al2O3–Al nanostructure are investigated theoretically. Sharp SP responses can be obtained in deep UV by setting an insulator grating on the aluminum film. It is found that the height of the grating element,the lattice parameter, and the filling factor can all modulate the DLSPPs of the Al2O3–Al nanostructure. We further find that this structure is sensitive to the embedding medium and can serve as a refractive index sensor in the UV region. The corresponding sensitivity increases with the decrease of the filling factor. The Al2O3–Al nanostructure may be useful for medical diagnostics and biotechnology in deep UV.
文摘In the present paper, we carried out a theoretical study of dielectric barrier discharge（DBD）filled with pure methane gas. The homogeneous discharge model used in this work includes a plasma chemistry unit, an electrical circuit, and the Boltzmann equation. The model was applied to the case of a sinusoidal voltage at a period frequency of 50 kHz and under a gas pressure of 600 Torr. We investigated the temporal variation of electrical and kinetic discharge parameters such as plasma and dielectric voltages, the discharge current density, electric field, deposited power density, and the species concentration. We also checked the physical model validity by comparing its results with experimental work. According to the results discussed herein, the dielectric capacitance is the parameter that has the greatest effect on the methane conversion and H_2/CH_4 ratio. This work enriches the knowledge for the improvement of DBD for CH_4 conversion and hydrogen production.
基金This work was supported by the National Nature Science Foundation of China under grants No. 60225011major state basic research program under grant No. G20000366
文摘The effect of dielectric constant contrast and the filling factor to the photonic bandgap in a 2-D square lattice photonic crystal is discussed. The location, width and number of photonic bandgap can be modulated.
