Ozga K, Kawaharamura T, Ali Umar A, Oyama M, Nouneh K, Slezak A, Fujita S, Piasecki M, Reshak A H, Kityk I V
Institute of Biology and Biophysics, Technical University Czestochowa, PL-42214, Aleja Armii Krajowej 36, Czestochowa, Poland.
Nanotechnology. 2008 May 7;19(18):185709. doi: 10.1088/0957-4484/19/18/185709. Epub 2008 Apr 2.
Photoinduced second harmonic generation (SHG) in Au nanoparticle-deposited ZnO nanocrystallite (NC) films was explored by applying bicolor coherent treatment of a Nd-YAG laser with wavelength 1.06 µm and its SHG. We have established that coexistence of the ZnO and Au nanoparticles gives a substantially larger SHG output with respect to pure ZnO NC deposited on the glass substrate. It was established that the value of the second order susceptibility is about 23 pm V(-1). Better nonlinear optical susceptibilities were obtained during phototreatment at temperatures near 30-35 °C for the Au doped samples. The samples without gold NCs are temperature independent. Generally an increasing temperature leads to a decrease of the optical SHG.
通过对波长为1.06 µm的Nd-YAG激光及其二次谐波进行双色相干处理，研究了沉积有金纳米颗粒的ZnO纳米微晶（NC）薄膜中的光致二次谐波产生（SHG）。我们已经确定，与沉积在玻璃基板上的纯ZnO NC相比，ZnO和金纳米颗粒的共存产生了显著更大的SHG输出。已确定二阶极化率的值约为23 pm V⁻¹。对于掺金样品，在30 - 35 °C附近的温度下进行光处理时获得了更好的非线性光学极化率。没有金纳米晶的样品与温度无关。一般来说，温度升高会导致光学SHG降低。
