Fig. 1. (a) Incident (green arrow), preselection (red arrow), and postselection (blue arrow) states of weak-value amplification represented in Poincare sphere. (b) Corresponding polarization angles.

Fig. 2. GH and IF shifts of the reflected vortex beam as functions of polarization angles ϕ1 and ϕ2. In the numerical calculation, θ=45°, w0=125  μm.

Fig. 3. Comparisons of the contributions of the OAM-dependent and OAM-independent terms in (a) GH and (b) IF shifts when ℓ=4, ϕ2=44°.

Fig. 4. Maximum OAM-induced (a) GH and (b) IF shifts changing with the incident angle. (c) Polarization angle ϕ0 and (d) optimized angle Δ changing with the incident angle.

Fig. 5. Experiment setup for the measurement of OAM-induced shifts by weak technique. Insets show the intensity distributions of the generated vortex beam after aperture and the beam in the image plane of CCD with GH and IF shifts.

Fig. 6. Experimental (dots) and theoretical (lines) results of the amplified OAM-induced (a) GH and (b) IF shifts changing with the angle of GLP1 ϕ1.

Fig. 7. (a) Comparisons of the experimental (first and third rows) and theoretical (second and fourth rows) intensity patterns of the transmitted beam from GLP2. The amplified OAM-induced (b) GH and (c) IF shifts changing with the incident OAM for ϕ1=179.7° and 180.7°.

Fig. 8. Experimental (dots) and theoretical (lines) results of the amplified OAM-induced (a), (c) GH and (b), (d) IF shifts changing with (a), (b) ϕ1 for ϕ2=45° and (c), (d) ϕ2 for ϕ1=163.3°.