Thermooptical distortions in liquid, inorganic luminophors

Malashko, Ya. I.; Rudnitskii, Yu. P.

doi:10.1007/bf00617302

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“…When we calculate Án, we substitute acetone's value for the sample's value of dn=dt, and C v , because the concentration of the sample is very small. With dn=dt acetone ¼ À4:9ðAE0:3Þ Â 10 À4 [18], we can calculate the value of Án as À7:3 Â 10 À6 . By the equation Án ¼ n 2 I 0 , Án can be obtained as À1:21 Â 10 À4 , so we can neglect the impact of the thermal effect.…”

Section: Resultsmentioning

confidence: 99%

Third-order nonlinear optical properties of a dmit²⁻salt by Z-scan technique

Cheng

Mao

Liu

et al. 2007

Journal of Modern Optics

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The non-resonant and resonant third-order nonlinear optical response of a charge-transfer salt (NBu 4 ) 2 ½ZnðdmitÞ 2 ] (dmit¼2-thioxo-1,3-dithiole-4,5-dithiolate) are investigated using the Z-scan technique with 38 ps laser pulse duration at the fundamental wavelength 1064 nm and half-wavelength 532 nm. Under 532 nm excitation, the solution exhibits strong saturable absorption (SA) with a nonlinear absorption coefficient ¼ À2:94 cm GW À1 and a negative third-order nonlinear refractive index attributed to self-defocusing, which is contrary to that under 1064 nm excitation. For the resonance factor, calculated as 32.2, the third-order nonlinear refractive index under the same experimental conditions is enhanced 10 2 times as compared to that under 1064 nm excitation. The molecular second hyperpolarizabilities ¼532nm ¼ À3:77 Â 10 À30 (esu) and ¼1064nm ¼ 1:18 Â 10 À32 (esu) are obtained from the experimental calculated results.

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Section: Resultsmentioning

confidence: 99%