Philip H. Jones, Onofrio M. Maragò & Giovanni Volpe
Figure 9.7 — Longitudinal forward scattering and longitudinal position detection
Figure 9.7 — Longitudinal forward scattering and longitudinal position detection. (a) Images of the field at the back focal plane of the condenser for various particle radii a and particle longitudinal displacement C = [0, 0, Cz]. The circles delimit the areas of the field that is captured by the condenser lens with NAo = 0.20, 0.65 (solid line) and 1.20 from the centre outwards. (b) Signal from a QPD as a function of Cz for the case of a = 400 nm (dotted line), a = 600 nm (dashed line) and a = 1000 nm (solid line) for an incident beam with power 1 mW and detection NAc = 0.65 (black lines) and 1.20 (grey lines).
