Table 2.

Comparison between the extracted nonlinear optical properties of Ag/Au bimetallic NPs from this work and previous studies.

Au@Ag Bimetallic NPs	Preparation Method	Wavelength(nm)	Pulse Duration	Repetition Rate (Hz)	Au–Ag Avg. Size (nm)	n2 (cm2/W)	Ref.
Au–Ag in water	Laser ablation	532	10 ns	10	14.8	−0.5 × 10−12	[51]
					16.3	−0.521 × 10−12
					11.6	−0.892 × 10−12
Au@Ag in water	Chemical	632.8	-	-	20	81.6× 10−6	[73]
Au@Ag in water	Chemical	1040	357 fs	1000	73	4.41 × 10−16	[71]
Au@Ag in water	Laser ablation	800	50 fs	1000	19.8	1.6 × 10−12	[72]
Au–Ag in water	Laser ablation	From 750 to 850	100 fs	80 × 106	8.5	From 6.26 × 10−15 to 6.45 × 10−15	This work