物理学报2011，Vol.60Issue(3)：281-284,4.
Au纳米颗粒阵列中双光子吸收的饱和过程
The two-photon absorption saturation process in an Au nanoparticle array
摘要
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.关键词
纳米球蚀刻技术/Au纳米颗粒/三阶光学非线性Key words
nanosphere lithography/ Au metal nanoparticles/ third-order nonlinearity引用本文复制引用
王凯,龙华,付明,张莉超,杨光,陆培祥..Au纳米颗粒阵列中双光子吸收的饱和过程[J].物理学报,2011,60(3):281-284,4.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. （批准号:60925021 and 10974062）
