Table 2.

Toroidal geometry of higher-order bessel beams with different phase values and parameters of the formed microchannels.

Phase value of the hologram radius s (pixels)	24	20	16
Spot inner ring radius (µm)	194.76	161.04	132.82
radius of the outer ring of the spot (µm)	135.25	100.97	73.58
Microchannel width (µm)	23.51	20.318	17.113
Microchannel Roughness (µm)	0.277	0.328	0.298