Table 1.

The three-photon absorption cross-section for 4 mg/L and 8 mg/L Au NP concentrations.

${\mathit{P}}_{\mathit{a}\mathit{v}\mathit{g}}\left(\mathbf{W}\right)$ $\mathbf{at}\mathsf{\lambda }=800\mathbf{nm}$	${\mathit{\sigma }}_3\times {10}^{-77} \left({\mathbf{cm}}^6{\mathbf{s}}^2/{\mathbf{photons}}^2\right)$		$\mathsf{\lambda }\left(\mathbf{nm}\right)$ $\mathbf{at}{\mathit{P}}_{\mathit{a}\mathit{v}\mathit{g}}=1.4 \mathbf{W}$	${\mathit{\sigma }}_3\times {10}^{-77} \left({\mathbf{cm}}^6{\mathbf{s}}^2/{\mathbf{photons}}^2\right)$
	4 mg/L	8 mg/L		4 mg/L	8 mg/L
0.8	5.305	3.115	740	7.364	3.986
1	5.688	4.122	760	8.251	4.256
1.2	6.020	4.249	780	8.737	4.523
1.4	8.878	5.131	800	8.878	5.446
1.6	12.638	6.472	820	9.541	5.661