Multilayer waveguide structures can realize full-color AR displays of diffractive waveguides. This paper discusses the field-of-view characteristics a system with multilayer structure when polarization volume gratings (PVG) are applied as couplers to achieve display. The effects refractive index and period parameter PVG-couplers on field view investigated. In addition, PVG sample an optimized d...

In recent years, high-speed wireless communication is in vogue. In wireless communication systems, multipath fading, delay and interferenc occurres by reflection or diffraction. In a high-speed wireless communication, it becomes a necessary to separate desired signal from delay or interference signal. Thus to overcome these problems Smart antenna systems have been developed. Basically there are...

In this work, we theoretically study the optical properties of a graphene nanoribbon with quantum dot (QD) on it. The system consists dimensions 400 × 3100 (nm2) and nanoscale radius. is symmetrically located at center to simplify mathematical model. To calculate (susceptibility) system, broadband electromagnetic wave (0.5–2.5 μm) applied structure model dipole-dipole interaction. Considering i...

A new dual-polarized antenna and array are presented for In-Band Full-Duplex (IBFD) applications, offering high inter-port isolation. The single-element system consists of four H-shape slots, stacked patches wide bandwidth, two external hybrid couplers. multilayer is well matched from about 2.1 to 2.4 GHz provides isolation in this frequency range excess 60 dB. Two different prototypes simulate...

The design of Cyclotron CYCHU-10 has been carried out at Huazhong University of Science and Technology (HUST). Because of the low centre frequency (99MHz) of its RF system, we should choose suitable directional couplers for the RF system which is supposed to be highdirectivity and tight-structure. This paper analyzes and synthesizes kinds of directional couplers, especially microstrip structure...

1098-4402= A slab-symmetric dielectric-loaded accelerator structure, consisting of a vacuum gap between dielectric-lined conducting walls, is described. The device is resonantly excited by an external drive laser which is side coupled into the acceleration region; a novel coupling scheme, which consists of an array of narrow, equally spaced slots in the upper structure boundary, is presented an...

An ultra-compact, ultra-broadband vertical coupler for dense photonic integrated circuits is reported with a 1.07 × 0.62 μm2 wavelength-scale footprint. This hybrid plasmonic-photonic uses unique two-plane plasmonic nanoantenna array on silicon-on-insulator waveguide. The in- and out-of-plane interference of the multipole moments dual-feed nanoantennas results in efficient, unidirectional coupl...

GANGAKHEDKAR, SHRUTI BHARAT. The Effects of Scaffolding Equipment Interventions on Muscle Activation and Task Performance in Frame Assembly and Disassembly Tasks. (Under the direct of Dr. David B. Kaber.) A local power utility’s injury database was analyzed to identify jobs with high injury rates for maintenance personnel. These jobs were analyzed for ergonomics-related hazards, first, using a ...

We experimentally demonstrate plasmonic nanocircuits operating as subdiffraction directional couplers optically excited with high efficiency from free-space using optical Yagi-Uda style antennas at λ0 = 1550 nm. The optical Yagi-Uda style antennas are designed to feed channel plasmon waveguides with high efficiency (45% in coupling, 60% total emission), narrow angular directivity (<40°), and lo...

Focused ion beam milling is a processing technology which allows flexible direct writing of nanometer scale features efficiently substituting electron beam lithography. No mask need results in ability for patterns writing even on fragile micromechanical devices. In this work we studied the abilities of the tool for fabrication of diffraction grating couplers in silicon nitride waveguides. The g...