Figure 1
Schematic of the simulation geometry. A uniform beam, propagating along the x-axis, impinges upon a sphere (radius R), a cylinder (radius R and height h), and a cube (length R) with refractive index n1 coated with a BDS with thickness dDS and index nDS. (a) Terajet characteristics include focal distance (calculated from the proximal surface of the particle to the locus of the maximum intensity), beam FWHM in xy plane, TJ length (measured as the distance between distal to proximal 1/\(e\) intensity contour along the direction of the TJ, i.e. x-axis), and the maximum relative intensity. Geometry of oblique incident for a (b) sphere/cylinder and (c) cube. In the core–shell structure shown in panel (a), nc (Rc) and ns (Rs) represent the refractive indices (radii) of the core and shell, respectively. Drawings are not to scale.
