Intensity and composition-dependent sign reversal of non-linearity in TiO2/CeO2 nanocomposites

doi:10.1088/1674-1056/23/3/034209

中国物理B ›› 2014, Vol. 23 ›› Issue (3): 34209-034209.doi: 10.1088/1674-1056/23/3/034209

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Intensity and composition-dependent sign reversal of non-linearity in TiO₂/CeO₂ nanocomposites

S. Divya, V. P. N. Nampoori, P. Radhakrishnan, A. Mujeeb

International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala 682022, India

收稿日期:2013-06-19 修回日期:2013-07-25 出版日期:2014-03-15 发布日期:2014-03-15
基金资助:
Project supported by the Department of Science and Technology (DST), Govt. of India.

Intensity and composition-dependent sign reversal of non-linearity in TiO₂/CeO₂ nanocomposites

S. Divya, V. P. N. Nampoori, P. Radhakrishnan, A. Mujeeb

International School of Photonics, Cochin University of Science and Technology, Cochin, Kerala 682022, India

Received:2013-06-19 Revised:2013-07-25 Online:2014-03-15 Published:2014-03-15
Contact: S. Divya E-mail:divyasasi7@gmail.com
Supported by:
Project supported by the Department of Science and Technology (DST), Govt. of India.

摘要/Abstract

摘要： CeO₂/TiO₂ composite nanoparticles with different Ce/Ti molar ratios have been successfully synthesized via sol–gel method. It was found that the band gap of the nanocomposite is tunable by varying Ce/Ti content. The nonlinear response of the sample was studied by using the nanosecond laser pulses from a Q switched Nd:Yag laser employing the Z-scan method. Open aperture Z-scan experiment revealed that with the increase in the CeO₂ amount in the nanocomposite, the non-linearity of the composite increases, and it was assumed that this could be due to the modification of TiO₂ dipole symmetry by the addition of CeO₂. Closed aperture Z-scan experiment showed that when the CeO₂ amount increases, positive nonlinear refraction decreases, and this could be attributed to the increase in the two photon absorption which subsequently suppresses the nonlinear refraction.

关键词: sol–, gel method, non-linearity, Z-scan experiment, reversesaturation absorption curve

Abstract: CeO₂/TiO₂ composite nanoparticles with different Ce/Ti molar ratios have been successfully synthesized via sol–gel method. It was found that the band gap of the nanocomposite is tunable by varying Ce/Ti content. The nonlinear response of the sample was studied by using the nanosecond laser pulses from a Q switched Nd:Yag laser employing the Z-scan method. Open aperture Z-scan experiment revealed that with the increase in the CeO₂ amount in the nanocomposite, the non-linearity of the composite increases, and it was assumed that this could be due to the modification of TiO₂ dipole symmetry by the addition of CeO₂. Closed aperture Z-scan experiment showed that when the CeO₂ amount increases, positive nonlinear refraction decreases, and this could be attributed to the increase in the two photon absorption which subsequently suppresses the nonlinear refraction.

Key words: sol–gel method, non-linearity, Z-scan experiment, reversesaturation absorption curve

中图分类号: (Nonlinear optics)

42.65.-k

42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)

S. Divya, V. P. N. Nampoori, P. Radhakrishnan, A. Mujeeb. Intensity and composition-dependent sign reversal of non-linearity in TiO₂/CeO₂ nanocomposites[J]. 中国物理B, 2014, 23(3): 34209-034209.

S. Divya, V. P. N. Nampoori, P. Radhakrishnan, A. Mujeeb. Intensity and composition-dependent sign reversal of non-linearity in TiO₂/CeO₂ nanocomposites[J]. Chin. Phys. B, 2014, 23(3): 34209-034209.

参考文献 27

[1]	Sanchez C, Lebeau B, Chaput F and Boilot J P 2003 Adv. Mater. 15 1969
[2]	Sanchez C, Soler-Illia G D A, Ribot F, Lalot T, Mayer C R and Cabuil V 2001 Chem. Mater. 13 3061
[3]	Novak B M 1993 Adv. Mater. 5 422
[4]	Wang Y, Zhang S and Wu X 2004 Nanotechnology 15 1162
[5]	Klosek S and Raftery D 2002 J. Phys. Chem. B 105 2815
[6]	Yamaki T, Sumita T and Yamamoto S 2002 J. Mater. Sci. Lett. 21 33
[7]	Sathish M, Viswanathan B and Viswanath R P 2007 Appl. Catal. B 74 307
[8]	Yuan Q, Duan H H, Li L L, Sun L D, Zhang Y W and Yan C H 2009 J. Colloid Interface Sci. 151 335
[9]	Orera V M, Merino R I and Pena F 1994 Solid State Ionics 72 224
[10]	Choudhury B, Bikash B and Amarjyoti C 2012 Photochem. Photobiol. A 31 1
[11]	Long H, Chen A, Yang G, Li Y and Lu P 2009 Thin Solid Films 517 5601
[12]	Divya S, Nampoori V P N, Radhakrishnan P and Mujeeb A 2013 Appl. Phys. A
[13]	Wang X H, Shi J, Dai S and Yang Y 2003 Thin Solid Films 429 102
[14]	Yang P, Song C F, Lü M K, Yin X, Zhou G J, Xu D and Yuan D R 2001 Chem. Phys. Lett. 345 429
[15]	Li F B, Li X Z, Hou M F, Cheah K W and Choy W C H 2005 Appl. Catal, A 285 181
[16]	Xie J, Jiang D, Chen M, Li D, Zhu J, Lu X and Yan C 2010 Colloids Surf. A 372 107
[17]	Blasse G, Schipper W and Hamelink J J 1991 Inorganica Chimica Acta 189 77
[18]	Fu C, Li T, Qi J, Pan J, Chen S and Cheng C 2010 Chem. Phys. Lett. 494 117
[19]	Chen S W, Lee J M, Lu K T, Pao C W, Lee J F, Chan T S and Chen J M 2010 Appl. Phys. Lett. 97 012104
[20]	Sheik-Bahae M, Said A A, Wei T H, Hagan D J and van Stryland E W 1990 IEEE J. Quantum Electron. 26 760
[21]	Torres-Torres D, Trejo-Valdez M, Castañeda L, Torres-Torres C, Tamayo-Rivera L, Fernández-Hernández R C, Reyes-Esqueda J A, Muñoz-Saldaña J, Rangel-Rojo R and Oliver A 2010 Opt. Express 18 16406
[22]	Wang S X, Zhang L D, Su H, Zhang Z P, Li G H, Meng G W, Zhang J, Wang Y W, Fan J C and Gao T 2001 Phys. Lett. A 281 59
[23]	Liu T X, Li X Z and Li F B 2010 Chem. Eng. J. 157 475
[24]	Sheik-Bahae M, Said A A and van Stryland E W 1989 Opt. Lett. 14 955
[25]	Sheik-Bahae M, Hagan D J and van Stryland E W 1990 Phys. Rev. Lett. 65 96
[26]	Wang K, Long H, Fu M, Yang G and Lu P X 2010 Opt. Lett. 35 1560
[27]	Draine B T and Flatau P J 1994 J. Opt. Soc. Am. A 11 1491

Intensity and composition-dependent sign reversal of non-linearity in TiO₂/CeO₂ nanocomposites

Intensity and composition-dependent sign reversal of non-linearity in TiO₂/CeO₂ nanocomposites

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