四叔丁基萘酞菁铅化合物的非线性和光限幅特性

Nonlinear and Optical Limiting Properties of Tetra tert-Butylnaphthalocyanine Lead

合成了四叔丁基萘酞菁铅[(t-Bu)4NcPb]化合物.利用元素分析、红外光谱、核磁共振氢谱等方法,验证了化合物的分子结构.应用调Q倍频ns/psNd:YAG脉冲激光系统,在波长为532nm下,研究了化合物的非线性和光限幅特性.测得化合物的非线性折射率n2和三阶非线性极化率χ(3)分别为2.42×10-11和7.91×10-12esu,通过计算得到分子极化率γ'为3.4×10-29esu.在透过率69%时限幅阈值为1522mJ/cm2,箝位值为553mJ/cm2,有效激发态与基态吸收截面比为3.16.

The compound of tetra tert-butylnaphthalocyanine lead was synthesized. The structure of the compound was characterized by means of elemental analysis, infrared spectrum and hydrogen nuclear magnetic resonance spectrum. A frequency-doubled Q switched Nd：YAG pulse laser system with ns/ps laser pulse was used for studying the nonlinear and optical limiting properties of the synthesized compound at the wavelength of 532 nm. The nonlinear refracting index, n2, and third-order nonlinear polarizabilitY, X（3） were determined to be 2.54 × 10^-11 and 9.51 ×10^-12 esu, respectively. The molecular polarizability of the compound γ＇ was calculated to be 3.3 × 10^-29 esu. When visible light transmittance was 69%, the limiting threshold value was 1522 mJ/cm2, the clamp value was 553 mJ/cm^2, and the ratio of absorption sectional area of effective excited state to that of ground state was 3.16.