Au纳米颗粒阵列中双光子吸收的饱和过程

王凯; 龙华; 付明; 张莉超; 杨光; 陆培祥

doi:10.7498/aps.60.034209

摘要

采用纳米球蚀刻法制备了Au纳米颗粒阵列.并通过扫描电子显微镜观测了其表面形貌,表明三角形的Au纳米颗粒呈阵列状分布.采用Z扫描方法(800 nm, 50 fs)测量了Au纳米颗粒阵列的三阶非线性光学特性.在较小的激发功率下,结果呈现出双光子吸收效应,随着激发功率不断增加,出现了双光子吸收饱和的过程;非线性折射则呈现出自散焦效应.这种高效率的非线性响应机理使得该种Au纳米颗粒阵列在高速全光开关中有潜在的应用价值.

关键词:

Abstract

The triangular Au nanoparticle array of size 37 nm was fabricated on a quartz substrate using nanosphere lithography. By performing the Z-scan method with femtosecond laser (800 nm, 50 fs), the optical nonlinearity of the Au nanoparticle array was determined. The results showed an intensity-related two-photon absorption saturation processes. As the excitation intensity increases, the nonlinear absorption changes from two-photon absorption to saturated absorption, while the nonlinear refraction exhibits self-defocusing effect. The one- and two-photon figures of merit, W=7.5 and T=0.12, were obtained, validating a high efficiency nonlinear material for all-optical switching.

Keywords:

作者及机构信息

1.
华中科技大学武汉光电国家实验室激光科学与技术研究部,武汉 430074

基金项目: 国家自然科学基金(批准号:60925021 and 10974062)和国家重点基础研究发展计划(批准号: 2010CB923203)资助的课题.

Authors and contacts

1.
Wuhan National Laboratory for Optoelectronics Division of Laser Science and Technology, Huazhong University of Science and Technology, Wuhan 430074,China

参考文献

[1]	Hong X, Du D D, Qiu Z R, Zhang G X 2007 Acta Phys. Sin. 56 7219 (in Chinese) [洪昕、张国雄 2007 物理学报 56 7219]
[2]	Zhu B H, Wang F F, Qian S X 2008 Acta Phys. Sin. 57 3085 (in Chinese) [朱宝华、钱士雄 2008 物理学报 57 3085]
[3]	Gong Z Q, Liu J Q 2010 Chin. Phys. B 19 067303
[4]	Polavarapu L, Xu Q H, Ji W 2008 Appli. Phys. Lett. 92 263110
[5]	Seo J T, Yang Q G, Temple D 2009 Opt. Lett. 34 307
[6]	Larson D R, Zipfel W R, Webb W W 2003 Science 300 1434
[7]	Samoc A, Samoc M, Luther-Davies B 1995 Opt. Lett. 20 1241
[8]	Wang Q Q, Han J B, Ren J J 2006 Adv. Func. Mat. 16 2405
[9]	Kamaraju N, Kumar S, Sood A K 2008 Appl. Phys. Lett. 93 091903
[10]	Kamaraju N, Kumar S, Sood A K 2009 Appl. Phys. Lett. 95 081106
[11]	Pan H, Chen W Z, Ji W 2006 Appli. Phys. Lett. 88 223106
[12]	Lee Y H, Yan Y L, Xu Q H 2009 Appli. Phys. Lett. 95 203105
[13]	Wang K, Long H, Lu P X 2010 Opt. Lett. 35 1560
[14]	Xenogiannopoulou E, Iliopoulos K, Couris S 2008 Adv. Func. Mater. 18 1281
[15]	Boni L D, Wood E L, Hernandez F E 2008 Plasmonics 3 171
[16]	Yang G, Wang W T, Chen Z H 2002 Appl. Phys. Lett. 81 3969
[17]	Yang W H, Schatz G C, Van Duyne R P 1995 Chem. Phys. 103 869
[18]	Jensen T R, Schatz G C, Van Duyne R P 1999 J. Phys. Chem. B 103 2394
[19]	Rybczynski J, Ebels U, Giersig M 2003 Colloids and Surfaces A 219 1
[20]	Yang G, Chen Z H, 2006 Acta Phys. Sin. 55 4342 (in Chinese) [杨光、陈正豪 2006 物理学报 55 4342]
[21]	Sheik-Bahae M, Said A A, Van Stryland E W 1990 IEEE J. Quantum Electron. 26 760

施引文献

[1]	Hong X, Du D D, Qiu Z R, Zhang G X 2007 Acta Phys. Sin. 56 7219 (in Chinese) [洪昕、张国雄 2007 物理学报 56 7219]
[2]	Zhu B H, Wang F F, Qian S X 2008 Acta Phys. Sin. 57 3085 (in Chinese) [朱宝华、钱士雄 2008 物理学报 57 3085]
[3]	Gong Z Q, Liu J Q 2010 Chin. Phys. B 19 067303
[4]	Polavarapu L, Xu Q H, Ji W 2008 Appli. Phys. Lett. 92 263110
[5]	Seo J T, Yang Q G, Temple D 2009 Opt. Lett. 34 307
[6]	Larson D R, Zipfel W R, Webb W W 2003 Science 300 1434
[7]	Samoc A, Samoc M, Luther-Davies B 1995 Opt. Lett. 20 1241
[8]	Wang Q Q, Han J B, Ren J J 2006 Adv. Func. Mat. 16 2405
[9]	Kamaraju N, Kumar S, Sood A K 2008 Appl. Phys. Lett. 93 091903
[10]	Kamaraju N, Kumar S, Sood A K 2009 Appl. Phys. Lett. 95 081106
[11]	Pan H, Chen W Z, Ji W 2006 Appli. Phys. Lett. 88 223106
[12]	Lee Y H, Yan Y L, Xu Q H 2009 Appli. Phys. Lett. 95 203105
[13]	Wang K, Long H, Lu P X 2010 Opt. Lett. 35 1560
[14]	Xenogiannopoulou E, Iliopoulos K, Couris S 2008 Adv. Func. Mater. 18 1281
[15]	Boni L D, Wood E L, Hernandez F E 2008 Plasmonics 3 171
[16]	Yang G, Wang W T, Chen Z H 2002 Appl. Phys. Lett. 81 3969
[17]	Yang W H, Schatz G C, Van Duyne R P 1995 Chem. Phys. 103 869
[18]	Jensen T R, Schatz G C, Van Duyne R P 1999 J. Phys. Chem. B 103 2394
[19]	Rybczynski J, Ebels U, Giersig M 2003 Colloids and Surfaces A 219 1
[20]	Yang G, Chen Z H, 2006 Acta Phys. Sin. 55 4342 (in Chinese) [杨光、陈正豪 2006 物理学报 55 4342]
[21]	Sheik-Bahae M, Said A A, Van Stryland E W 1990 IEEE J. Quantum Electron. 26 760

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