Nonlinear Refraction of Peripheral-Substituted Zinc Phthalocyanines Investigated by Nanosecond and Picose-cond Z Scans

• 作者: Jiandong Huang Meirong Ke Timothy M Pritchett Wenfang Sun Yunjing Li
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 化学
• 关键词: Nonlinear REFRACTION Zinc PHTHALOCYANINE Z Scan EXCITED-STATE REFRACTION CROSS-SECTION Wavelength Dispersion
• 年，卷（期）: 2011,（2）
• 页码范围: 70-74
• 页数: 5页
• 分类号: O6

摘要

The singlet and triplet excited-state refraction cross-sections of dimethyl sulfoxide (DMSO) solutions of ten zinc phthalocyanine derivatives with mono-or tetra-peripheral substituents at 532 nm were obtained by simultaneous fitting of closed-aperture Z scans with both nanosecond and picosecond pulse widths. Self-focusing of both nanosecond and picosecond laser pulses was observed in all complexes at 532-nm wavelength. The complexes with tetra-substituents at the ?-position exhibit relatively larger refraction cross-sections than the other complexes. The wavelength dependence of the singlet refraction cross-section of a representative complex was observed to be non-monotonic in the range of 470 - 550 nm.