Philip H. Jones, Onofrio M. Maragò & Giovanni Volpe
Fig. 9.7 — Longitudinal forward scattering and longitudinal position detection
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).
Fig. 9.7 — Longitudinal forward scattering and longitudinal position detection