High-order diffraction and nanolayer electrostatic modification in Cu-doped (K0.5Na0.5)0.2(Sr0.75Ba 0.25)0.9Nb2O6 crystals

作者：Zhao, Hua; Li, Liang; Hu, Guangwei; Zhang, Jingwen^*

来源：Optical Materials Express, 2016, 6(2): 509-516.

DOI：10.1364/OME.6.000509

• PUMPED PHASE-CONJUGATION
• SURFACE-PLASMON POLARITONS
• WAVE-GUIDE
• MODULATION
• CELLS
• FILMS
• FIELD

Electrostrictive and photoinduced charge accumulation in the nanoscale interfaces of air and copper-doped (K0.5Na0.5)(0.2)(Sr0.75Ba0.25)(0.9)Nb2O6 crystals and electrostatic modification to the nanolayer interfaces were studied with conventional two beam coupling. This interface modification was confirmed by (1) emerging 2 dimensional diffraction patterns with over 10 high orders and 6 rows; (2) remarkable electroinduced power change of specular reflection on the very first surface; and (3) the energy coupling of the first reflected beam with another coherent laser beam in the subwavelength scale. Distinct responses to perturbation show coexistence of a surface grating and bulk ones in the sample. Theoretical consideration on excitation of surface plasmon polaritons through photorefractive phase grating mediation was given to elucidate all the related observations.

• 出版日期2016-2-1
• 单位哈尔滨工业大学