Web10 jul. 2024 · The maximum observed numerical aperture is 0.020, measured at 1155 nm wavelength from the waveguide written with 620 nJ pulse energy. Such waveguides could be incorporated in integrated... WebThe numerical aperture 22 core cladding NA n n (as already defined on p. 1) is related to the refractive index contrast. If the index difference δnn n core cladding is small (which is usually the case), we can approximate NA n n 2 cladding δ . The V number (p. 10) is 22 core cladding 2π 2π λλ V a NA a n n .
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Web12 feb. 2024 · They end up with a slightly different horn antenna equation (which is a 4th order polynomial) which has to be numerically solved to get the value of the aperture width B. However, that equation contains the waveguide dimensions a and b, … Web14 nov. 2024 · A novel, rectangle-based, porous-core photonic crystal fiber (PCF) has been modeled for the efficient propagation of a THz wave. The performance of the anticipated model has been assessed using the finite element method (FEM) in the range of 0.5–1.5 THz. Both the fiber core and cladding are modeled with rectangular air … truffey
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Web30 nov. 2024 · 1. A waveguide that can support only one mode. Note: Because different wavelengths constitute different modes and the number of modes is also dependent on … WebPhase velocity and group velocity Phase velocity is an almost useless piece of information you'll find in waveguide mathematics; here you multiply frequency times guide wavelength, and come up with a number that … Web6 apr. 2024 · For thorough comparison, we also modeled the focal profile of a binary absorption zone plate with equal numerical aperture (see Fig. 4A for the absorption profile and Fig. 4B for the design). The juxtaposition of the focal profiles generated by the zone plate and the metalens shown in Fig. 4D highlights notable differences in focus quality … philip holmer