Lorentz force on dielectric and magnetic particles 835 Figure 5. Lorentz force density [10-N/m l for two particles positioned at (a, y)=(100, 0), (300, 0)nm] illuminated by the three plane waves of free space wavelength Ao= 532 nm as shown in Fig. 1 The top plots are(a) y-directed force fy and(b)i-directed force fr for the particle at (a, y)=(0, 100)[nm]. The bottom plots are (c)y-directed force fy and(d) -directed force fr for the particle at(r, y)=(0, -300)nm]. The total Lorentz force on the particles is obtained by summation of the force densities on the particle at (a, y)=(0,100)[nm)(F=y1.650010-8[N/m)and the particle at(x,y)=(0,-300)lnm](F=-91.4523·10-18N/m]). For boti particles, the a-directed force is zero due to symmetry 5. RADIATION PRESSURE ON A MAGNETIC PARTICLE The Lorentz force has been previously applied to bound magnetic charges and currents to calculate the radiation pressure on a magnetic slab [ 14. However, the method has not been used to determine the force on magnetic particles. In this section, we calculate the radiation pressure on a 2-D magnetic particle represented by an infinite cylinder incident by a single te plane waveLorentz force on dielectric and magnetic particles 835 Figure 5. Lorentz force density [10−4 N/m3] for two particles positioned at (x, y) = (100, 0),(−300, 0) [nm] illuminated by the three plane waves of free space wavelength λ0 = 532 nm as shown in Fig. 1. The top plots are (a) ˆy-directed force fy and (b) ˆx-directed force fx for the particle at (x, y) = (0, 100) [nm]. The bottom plots are (c) ˆy-directed force fy and (d) ˆx-directed force fx for the particle at (x, y) = (0, −300) [nm]. The total Lorentz force on the particles is obtained by summation of the force densities on the particle at (x, y) = (0, 100) [nm] (F¯ = ˆy1.6500 · 10−18 [N/m]) and the particle at (x, y) = (0, −300) [nm] (F¯ = −yˆ1.4523 · 10−18 [N/m]). For both particles, the ˆx-directed force is zero due to symmetry. 5. RADIATION PRESSURE ON A MAGNETIC PARTICLE The Lorentz force has been previously applied to bound magnetic charges and currents to calculate the radiation pressure on a magnetic slab [14]. However, the method has not been used to determine the force on magnetic particles. In this section, we calculate the radiation pressure on a 2-D magnetic particle represented by an infinite cylinder incident by a single TE plane wave