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In this study, the effect of V/III ratio on the structural quality of Au-catalyzed InAs nanowires grown by molecular beam epitaxy is investigated. It is found that, by tuning the V/III ratio, the structural quality of InAs nanowires can be controlled, and defect-free wurtzite structured InAs nanowires have been achieved under low V/III ratio growth.
Surface plasmon resonance (SPR) is a key sensing technique for chemical and biological sensor. Recently, researchers proposed different nanostructures for refractive index and bio-sensing [1–4]. In this work, we proposed a high sensitivity refractive index sensor based on modulations of digital versatile discs (DVD) structures. We used laser beam lithography process to fabricate regular substructures...
Light trapping in amorphous silicon thin film solar cells has been an intensive study owing to the low absorption coefficient in near-infrared. We demonstrate a frontal pre-patterned substrate (PPS) on amorphous silicon solar cells, utilizing scalable colloidal lithography, to serve both functions of anti-reflection and light trapping effect. We show that a solar cell with front pre-patterned substrate...
The enhanced photoelectric conversion is demonstrated in nanostructured glass substrates for a-Si thin film solar cell. The nanostructured glass substrates were fabricated using nanosphere lithography and RIE technique. The nanostructure substrates provide antireflective and light scattering characteristics, which enhance the broadband light absorption, especially in near-infrared range. Finally we...
Enhanced photoelectric conversion is demonstrated in a crystalline silicon (c-Si) solar cell with frustum nanorod arrays (FNAs). The omnidirectional antireflection of FNAs is also investigated using an angle-resolved reflectance spectroscopy and simulated by RCWA method.
In this research, the ZnO biosensor is successfully grown on the (100) silicon substrate. The lithography technology is sued to fabricate the biosensor. The test system of humidity sensor is constructed in our laboratory with measurement information system. The test information system can precisely examine the relativity humidity message of environment. The impedance information of ZnO biosensor is...
In this paper, we present a systematic analysis of periodic structures based on substrate integrated waveguide (SIW) technology. In the periodic structures of interest, the unit cell is a circularly-shaped SIW section, which can be extended to any shape. In the beginning, the propagation constants of both even and odd modes of the SIW periodic structures are accurately extracted with the help of a...
This paper overviews the state-of-the-art of the substrate integrated waveguide (SIW) techniques in the design and realization of innovative and low-loss millimetre-wave antenna arrays and beamforming networks for low-cost satellite and mobile systems. Novel classes of SIW-based antenna and beamforming techniques on the basis of this concept of substrate integrated circuits (SICs) are demonstrated...
Improvements in energy damage threshold of gold nanoantennas were studied using stabilizing dielectric films. Annealed nanoantennas show a stronger plasmonic resonance, but have a decreased damage threshold.
This paper presents a novel electronically tunable substrate integrated waveguide (SIW) cavity resonator at microwave frequency. The resonant frequency of the cavity is tuned with different DC biasing voltages applied over a varactor coupled to the cavity. This structure has been analyzed with a full-wave software package. To validate our analysis, an X-band reflective tunable SIW cavity resonator...
A novel transition between conductor-backed coplanar waveguide (CBCPW) and substrate integrated waveguide (SIW) is presented for microwave and millimeter-wave integrated circuit design. The proposed integrated transition that can provide simultaneous field and impedance matching, exhibits outstanding low-loss performances over an ultra-wideband range (entire Ka-band in our case). In this work, a generalized...
A new type of parallel-coupled microstrip filter is proposed to have wide-band performance and suppress the second harmonic response. The proposed filters are constructed with using floating plate overlays to enhance the coupling between microstrip lines, and compensate the difference in phase velocity under even- and odd-mode excitations. The synthesis method is well developed and the design curves...
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