Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

Table 2 The real part of the cubic NLO susceptibility Re(χ ⁽³⁾), the peak laser intensity magnitude of the first extremum I _ex, and scattering losses into forward (FH) and backward (BH) hemispheres at 1064 nm for the samples of functionalized porous silicon

No.	Sample	I _ex, MW/cm ²	\(\text {Im}(\chi ^{(3)}_{\text {eff}}), \times 10^{-11}\) esu	Re(χ ⁽³⁾), ×10⁻⁸ esu		Scattering losses, %
			25–50 MW/cm²	25–50 MW/cm²	190–240 MW/cm2	FH	BH
1	Aged-PS	82.6	−1.7	−1.0	−0.5	0.4	0.5
1’	Ref-PS	50.7	1.1	2.0	−0.2	0.6	0.4
2	PS-C10	42.3	−0.2	0.2	−0.1	0.4	0.2
3	PS-C18	115.1	5.3	1.9	−0.2	0.4	0.1
4	PS-ox	167.2	−1.2	0.6	−0.2	0.7	0.6