Equation (16.35) shows that to obtain a sharp line (narrow angular width), the diffraction grating should have a large total width Nd. Further, because of the cosine factor, lines at larger angles have a larger angular width Δθm. Note that, for small θm, where cosθm≈ 1, Δθm...
Equation (16.35) shows that to obtain a sharp line (narrow angular width), the diffraction grating should have a large total width Nd. Further, because of the cosine factor, lines at larger angles have a larger angular width Δθm. Note that, for small θm, where cosθm≈ 1, Δθm...
Multiplexed volume Bragg gratingAngular magnificationChannel crosstalkThe demand for compact transmitting volume Bragg gratings (TVBGs) for non-mechanical angular magnification is growing quickly in the industrial and defense areas. However, channel crosstalk limits the angular width and diffraction efficiency...
To simultaneously maintain low absorption and high efficiency, we have devised a vertical truncated wavelength structure as our meta-atom. This meta-atom assumes the form of a cuboid with specific dimensions: height (H), length (L), width (W), and a lattice constant (P), as illustrated in...
3c do not take the interference vis- ibility into account because the width of the sinc2 function is ignored. In other words, the complete interference expression should have the form [1 + V(d)cos(2dωs/c)]/2, where the function V(d) represents the interference visibi- lity and V(...
3c do not take the interference vis- ibility into account because the width of the sinc2 function is ignored. In other words, the complete interference expression should have the form [1 + V(d)cos(2dωs/c)]/2, where the function V(d) represents the interference visibi- lity and V(...
The eight waveguide dimensions we choose for experimental investigation are marked in the map, and their parameters are listed in Table 1, where the subscripts w and h in the notation for waveguide sample WGw−h indicate the width and height of waveguide (in the unit of 100 nm), ...
D and d are defined as 1/e2 width. It should be noted that, SM is calculated on the basis of changes in H when the mirror reflector is subjected to an angular displacement of ± 5 arc- seconds. Figure 9b shows the variation of SM as a function of D at a focal length f...
The width of the curve, as occurs with the angular selectivity, depends on the spatial period of the interference recorded and the thickness of the material. Fig. 2(a) corresponds to an ideal case, with the largest spatial period possible within the range of volume hologram. In general, ...
To incorporate this effect, a line-scan simulated coincidence at qB=0 is shown with a width of w (which is evaluated by the full-width at its half-maximum) in the inset of Figure 4d. For a given qB, the width w determines the range of qA where the coincidence is high. The ...