Near-Field Diffraction from a Binary Microaxicon

<table>The diameter of the light spot on the axis (in wavelengths) as a function of distance from binary axicons with period (a) 4 <i>μ</i>m and (b) 8 <i>μ</i>m.</table>

Advances in Optical Technologies

fig4

Figure 4

Figure 4: Near-Field Diffraction from a Binary Microaxicon 