Table 2.

Effective decay length and optical power as a function of the bead diameter (λ=532 nm, TE-polarization, θ=75, bead composition: 5% QDs and 20% magnetite). Fluorescent power is scaled up by a factor of 100 for ease of comparison.

Diameter	200 nm	400 nm	600 nm	800 nm	1000 nm	1400 nm
Process
Decay length (nm)
Sphere absorption	96.0	96.2	96.1	96.0	96.7	96.3
Observed scattering	84.2	84.0	80.8	78.5	80.0	76.1
Sphere fluorescence	96.5	96.5	96.2	96.1	96.4	94.9
Transmitted fluorescence	83.9	82.9	78.8	76.6	75.5	68.2
Maximum optical power (probe at z=2 nm)
Sphere absorption	0.011	0.052	0.117	0.203	0.317	0.699
Observed scattering	0.020	0.181	0.386	0.553	0.707	1.00
Sphere fluorescence (×102)	0.005	0.078	0.235	0.499	0.780	1.45
Transmitted fluorescence (×102)	0.003	0.034	0.068	0.102	0.103	0.108