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|Title:||The mixed metal cluster (n-Bu4N)2[MoCu3OS3(NCS) 3]: the first example of a nest-shaped compound with large third-order polarizability and optical limiting effect|
|Authors:||Shi, S. |
|Keywords:||Mixed metal nido-clusters|
Optical limiting effect
|Source:||Shi, S.,Ji, W.,Xie, W.,Chong, T.C.,Zeng, H.C.,Lang, J.P.,Xin, X.Q. (1995-01-31). The mixed metal cluster (n-Bu4N)2[MoCu3OS3(NCS) 3]: the first example of a nest-shaped compound with large third-order polarizability and optical limiting effect. Materials Chemistry & Physics 39 (4) : 298-303. ScholarBank@NUS Repository.|
|Abstract:||A mixed metal nido-cluster, (n-Bu4N)2[MoCu3OS3(NCS) 3], was discovered to exhibit large third-order polarizability (γ) and optical limiting effect. This is the first example of a nest-shaped compound with large nonlinear optical coefficients. The magnitude of the third-order polarizability, |γ|= 4.8 × 10-29 esu, was determined with 7-ns laser pulses of 532 nm wavelength by a degenerate four-wave mixing technique. An irradiance-dependent transmission measurement was conducted to assess the contribution of nonlinear absorption to the γ value. These results, in combination with those of a Z-scan experiment, yielded a negative value for the real part of γ, Reγ = -4.8 × 10-29 esu. The negative sign of Reγ reveals that the nido-cluster has an interesting optical self-defocusing property. The optical limiting effect of the cluster was also demonstrated. © 1995.|
|Source Title:||Materials Chemistry & Physics|
|Appears in Collections:||Staff Publications|
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