Nonlinear absorption of CS₂ at the wavelength of 400 nm with femtosecond pulses

详细信息	查看全文 | 推荐本文 |

• 作者：DeGui Kong^a ; ^b ; Qing Chang^a ; YaChen Gao^a ; Hong'An Ye^a ; LiXin Zhang^a ; Guang Shi^b ; XueRu Zhang^b ; YuXiao Wang^b ; Kun Yang^b ; YingLin Song^b ; ^c ; ^{ylsong@hit.edu.cn}
• 关键词：Femtosecond ; Two-photon absorption ; Excited state aborption
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 April, 2012
• 卷：407
• 期：8
• 页码：1279-1281
• 文件大小：267 K

摘要

Nonlinear absorption of carbon disulfide (CS₂) was investigated by Z-scan technique and time-resolved pump-probe technique with femtosecond pulses at 400 nm wavelength. By the two techniques, we confirmed that the nonlinear absorption of CS₂ arise from a combination of two-photon absorption (TPA) and the excited state absorption induced by TPA under the incident laser pulses with 400 nm wavelength. The coefficient of TPA, the absorption cross-section of low excited state and lifetime of low excited state were obtained by theoretical fitting the experimental results. The results indicated that the CS₂ has good optical limiting capability at 400 nm wavelength.