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Nonlinear absorption of CS2 at the wavelength of 400 nm with femtosecond pulses |
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| Authors: | DeGui Kong Qing ChangYaChen Gao Hong'An YeLiXin Zhang Guang ShiXueRu Zhang YuXiao WangKun Yang YingLin Song |
| Institution: | a College of Electronic Engineering, Heilongjiang University, Harbin 150080, PR China b Department of Physics, Harbin Institute of Technology, Harbin 150001, PR China c School of Physical Science and Technology, Suzhou University, Suzhou 215006, PR China |
| Abstract: | 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. |
| Keywords: | Femtosecond Two-photon absorption Excited state aborption |
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