Wangzi Ma, Dawei Zhang, Linwei Zhu, Jiannong Chen. Super-long longitudinal magnetization needle generated by focusing an azimuthally polarized and phase-modulated beam[J]. Chinese Optics Letters, 2015, 13(5): 052101
- Chinese Optics Letters
- Vol. 13, Issue 5, 052101 (2015)
Fig. 1. (a) Annular vortex filter composed of two annular belts with π z
Fig. 2. Longitudinal magnetization distribution along the z θ 1 θ 2 Δ z θ 1 = 1.19 θ 2 = 1.21 θ 1 = 1.19 θ 2 = 1.23 θ 1 = 1.17 θ 2 = 1.21 θ 1 = 1.17 θ 2 = 1.19 Δ z = 1.90 λ Δ z = 1.95 λ Δ z = 2.00 λ Δ z = 2.05 λ
Fig. 3. Normalized longitudinal magnetization distribution along the radial direction at z = 0 z = 9 λ θ 1 = 1.17 θ 2 = 1.21 θ 1 = 1.19 θ 2 = 1.21 Δ z = 2.00 λ 0.27 λ
Fig. 4. Two-dimensional intensity distribution of (a) the electric field and (b) longitudinal magnetization in the longitudinal plane of the focal volume. The parameters are θ 1 = 1.17 θ 2 = 1.21 Δ z = 1.95 λ
Fig. 5. Three-dimensional half-maximum surface of the electric field (left panel) and longitudinal magnetization needle (right panel) in the focal volume.
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