Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid
Problem statement: The nonlinear refractive index and nonlinear absorption are two important optical phenomena which are extensively used in optical switching, optical limiting and labeling. Approach: In the present research we had measured nonlinearity of Ag nano-fluid prepared using g-irradiatio...
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my.upm.eprints.167272017-12-04T09:45:08Z http://psasir.upm.edu.my/id/eprint/16727/ Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid Shahriari, Esmaeil Mat Yunus, Wan Mahmood Problem statement: The nonlinear refractive index and nonlinear absorption are two important optical phenomena which are extensively used in optical switching, optical limiting and labeling. Approach: In the present research we had measured nonlinearity of Ag nano-fluid prepared using g-irradiation method. The measurement was carried out using a single beam z-scan technique. Under a CW laser beam excitation operated at 532 nm with the power output of 40 mW, a closed aperture setup was used for thermal-induced nonlinear refractive index and an open aperture setup was applied for measuring nonlinearity absorption. Results: We measured the nonlinear refraction coefficient and nonlinear absorption coefficients for silver nano-fluid at concentration 6.475×10-3 M,the values obtained were -6.173×10-8 cm2 W-1 and 7.994×10-3 cm W-1 respectively. Conclusion: The nonlinear refraction coefficient with the negative sign indicates the self-defocusing phenomenon. The experimental data from open aperture measurement showed that a two photon absorption phenomenon. These results showed that the Ag nano-fluid has significant values of nonlinear refractive index and nonlinear absorption, thus it could be good candidate for optical devices. Science Publications 2010 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/16727/1/ajeassp.2010.98.101.pdf Shahriari, Esmaeil and Mat Yunus, Wan Mahmood (2010) Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid. American Journal of Engineering and Applied Sciences, 3 (1). pp. 98-101. ISSN 1941-7020; ESSN: 1941-7039 http://www.thescipub.com/abstract/10.3844/ajeassp.2010.98.101 10.3844/ajeassp.2010.98.101 |
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Problem statement: The nonlinear refractive index and nonlinear absorption are two important optical phenomena which are extensively used in optical switching, optical limiting and labeling.
Approach: In the present research we had measured nonlinearity of Ag nano-fluid prepared using g-irradiation method. The measurement was carried out using a single beam z-scan technique. Under a CW laser beam excitation operated at 532 nm with the power output of 40 mW, a closed
aperture setup was used for thermal-induced nonlinear refractive index and an open aperture setup was
applied for measuring nonlinearity absorption.
Results: We measured the nonlinear refraction coefficient and nonlinear absorption coefficients for silver nano-fluid at concentration 6.475×10-3 M,the values obtained were -6.173×10-8 cm2 W-1 and 7.994×10-3 cm W-1 respectively. Conclusion: The nonlinear refraction coefficient with the negative sign indicates the self-defocusing phenomenon. The
experimental data from open aperture measurement showed that a two photon absorption phenomenon. These results showed that the Ag nano-fluid has significant values of nonlinear refractive index and nonlinear absorption, thus it could be good candidate for optical devices. |
| format |
Article |
| author |
Shahriari, Esmaeil Mat Yunus, Wan Mahmood |
| spellingShingle |
Shahriari, Esmaeil Mat Yunus, Wan Mahmood Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| author_facet |
Shahriari, Esmaeil Mat Yunus, Wan Mahmood |
| author_sort |
Shahriari, Esmaeil |
| title |
Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| title_short |
Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| title_full |
Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| title_fullStr |
Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| title_full_unstemmed |
Single beam Z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| title_sort |
single beam z-scan measurements of nonlinear refraction and nonlinear absorption coefficients in silver nano-fluid |
| publisher |
Science Publications |
| publishDate |
2010 |
| url |
http://psasir.upm.edu.my/id/eprint/16727/1/ajeassp.2010.98.101.pdf http://psasir.upm.edu.my/id/eprint/16727/ http://www.thescipub.com/abstract/10.3844/ajeassp.2010.98.101 |
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