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Optical nonlinearity of organic dyes as studied by Z-scan and transient grating techniques |
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| Authors: | Umakanta Tripathy R. Justin Rajesh Prem B. Bisht A. Subrahamanyam |
| Affiliation: | (1) Department of Physics, Indian Institute of Technology-Madras, 600 036 Chennai, India |
| Abstract: | The excited state absorption cross-section of 5,5′-dichloro-11-diphenyl-amino-3,3′-diethyl-10, 12-ethylinethiatricarbocyanine perchlorate (IR140) have been measured by using a single beam transmission technique. Z-scan experiments have been used to find out a few nonlinear parameters. The excited state relaxation times have also been measured by using laser induced transient grating (LITG) technique. |
| Keywords: | Excited state absorption Z-scan nonlinear refractive index excited state relaxation transient grating |
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