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Spatial intensity distributions on glass at 640 nm of (a) 
(b) 
(c) comparison of line traces of 
(along k-k’) and 
(along l-l’) (d) Numerical calculations of normalized optical force obtained by evaluating (1) (e) Comparison of line traces of normalized optical force obtained experimentally (line a-a’ in Fig. 2 (b)) and calculations (line m-m’ in (c)) showing good agreement.(f) Normalized optical force measured experimentally with different gold coated AFM probes.
