The transmission properties of double-ring split ring resonator(SRR) arrays and closed ring resonator arrays are measured using terahertz(THz) time-domain spectroscopy. This technique allows for the simultaneous measu...The transmission properties of double-ring split ring resonator(SRR) arrays and closed ring resonator arrays are measured using terahertz(THz) time-domain spectroscopy. This technique allows for the simultaneous measurement of the amplitude and phase of the transmission coefficient as a function of frequency. The ability to directly measure the phase spectrum is expected to be important in characterizing potential negative index media. In the employed experimental geometry, THz pulses are normally incident on the arrays. Thus, the magnetic field lies in the plane of the arrays and cannot contribute to the magnetic resonance of the SRR. However, it is found that the electric field, when appropriately polarized, can couple to the magnetic resonance. Shifts in the resonance properties with changes in the SRR dimensions and the substrate medium are measured, the results of which are consistent with theory.展开更多
This paper introduces the basic kinetic and thermodynamic factors affecting step-bunching instability and derive the one-dimensional(1D) step motion equation based adatom diffusion equation for further analysis.The st...This paper introduces the basic kinetic and thermodynamic factors affecting step-bunching instability and derive the one-dimensional(1D) step motion equation based adatom diffusion equation for further analysis.The step-bunching instability is analyzed for different cases.展开更多
In this paper, the GaN based epitaxial wafer is fabricated on big 1 mmx1 mm chips, and packaged with a special technology. At working current 350 mA and working voltage 3.74 V, the full viewing angle, the axial bright...In this paper, the GaN based epitaxial wafer is fabricated on big 1 mmx1 mm chips, and packaged with a special technology. At working current 350 mA and working voltage 3.74 V, the full viewing angle, the axial brightness and the output integral power of the 465 nm LED can reach 125? 210, 000 cd/m2 and 1.5 1m, respectively. The LED with such good performances has promising application potential in the fields of display, traffic and the development of solid-state white light source.展开更多
文摘The transmission properties of double-ring split ring resonator(SRR) arrays and closed ring resonator arrays are measured using terahertz(THz) time-domain spectroscopy. This technique allows for the simultaneous measurement of the amplitude and phase of the transmission coefficient as a function of frequency. The ability to directly measure the phase spectrum is expected to be important in characterizing potential negative index media. In the employed experimental geometry, THz pulses are normally incident on the arrays. Thus, the magnetic field lies in the plane of the arrays and cannot contribute to the magnetic resonance of the SRR. However, it is found that the electric field, when appropriately polarized, can couple to the magnetic resonance. Shifts in the resonance properties with changes in the SRR dimensions and the substrate medium are measured, the results of which are consistent with theory.
文摘This paper introduces the basic kinetic and thermodynamic factors affecting step-bunching instability and derive the one-dimensional(1D) step motion equation based adatom diffusion equation for further analysis.The step-bunching instability is analyzed for different cases.
文摘In this paper, the GaN based epitaxial wafer is fabricated on big 1 mmx1 mm chips, and packaged with a special technology. At working current 350 mA and working voltage 3.74 V, the full viewing angle, the axial brightness and the output integral power of the 465 nm LED can reach 125? 210, 000 cd/m2 and 1.5 1m, respectively. The LED with such good performances has promising application potential in the fields of display, traffic and the development of solid-state white light source.
