Characterization of the nonlinear optical properties of nanocrystals by Hyper Rayleigh Scattering

Table 1 Results

	Mean DLS size D_m [nm]	$< β_{n c} >$ [10^-24 esu]	<d_mono> [pm/V]	<d_poly> [pm/V]	<d_bulk>* [pm/V]
BaTiO₃	91	5.16	5.5		14.1 - [45]
KNbO₃	128	21.8	8.3	5.6	15.3 - [46]
KTP	237	33.5	2.8	1.4	7.6 - [46]
LiNbO₃	125	16.3	7.4	4.9	17.3 - [47]
ZnO 90-200	132	7.12	2.5	1.2	2.8 - [48]
ZnO 20	50	0.33	2.1		2.8 - [48]

Mean NC size considering DLS distribution by number, effective hyperpolarizability $< β_{n c} >$ , averaged nonlinear optical coefficient derived from monodisperse ( $< d_{m o n o} >$ ) and polydisperse ( $< d_{p o l y} >$ ) suspensions and comparison with literature values ( $< d_{b u l k} >$ ) for the different SH nanocrystals. Error bars for $< β_{n c} >$ and $< d_{m o n o} >$ are estimated at ± 15% in terms of experimental reproducibility.
*<d²> = 6/35 d₃₃² + 32/105 d₃₁.d₃₃ + 92/105 d₃₁² for BaTiO₃ (4 mm) and ZnO (6 mm)
<d²> = 6/35 d₃₃² + 38/105 (d₃₂² + d₃₁²) + 16/105 (d₃₁.d₃₂ + d₃₁.d₃₃ + d₃₂.d₃₃) for KTP (mm2) and KNbO₃ (mm2)
<d²> = 6/35 d₃₃² + 92/105 d₃₁² + 8/21 d₂₂² + 32/105 d₃₁.d₃₃ for LiNbO₃ (3 m)

ISSN: 1477-3155