Fig. 1. (a) Optical system of layered-resolved all-optical toggling of magnetization. (b) Diagram showing incident beams focused by an objective lens into a two-layer MOF. L, objective lens; MOF, magnetic-optic film.

Fig. 2. Refractive index and focal length of an N-BK7 plano-convex uncoated lens as a function of the wavelength λ.

Fig. 3. Intensity distributions in the (a) x′−y′ plane and (c) y′−z plane, respectively. Induced magnetization in the (b) x′−y′ plane and (d) y′−z plane, respectively. The incident beam is left circularly polarized with wavelength λ=780nm. The intensity and the magnetization are normalized to the maximum value of the intensity and magnetization, respectively.

Fig. 4. Total intensity distributions on the y−z plane of two focused beams with wavelength (a) λ1=780nm and (b) λ2=800nm. (c) Cross-section total intensity distribution on the y−z plane.

Fig. 5. Transmission coefficients and reflection coefficients under different θ.

Fig. 6. Total intensity distribution of the focal fields with different wavelengths in the whole spatial range. (a1), (b1) Amplitude constant A0=1. (a2), (b2) Amplitude constant A0=1.35.

Fig. 7. (a) Total intensity distribution of the focal fields with different wavelengths in the whole spatial range. (b) Cross-section total intensity distribution on the y−z plane.

Fig. 8. Chromatic aberration of the focal lengths under different probe depths l.

Fig. 9. Scheme of information multiplexing by the multi-layer magnetic recording system. The incident beams are with different wavelengths and polarizations. L, left-handed circular polarization; R, right-handed circular polarization; H, hybrid polarization.

Fig. 10. (a) Intensity distributions and (b) induced magnetization in the y′−z plane. The incident beam is right circular polarization. The intensity and the magnetization are normalized to the maximum value of the intensity and magnetization, respectively.