Jingquan Wang

Synthesis and Photoluminescence Enhancement of Silver Nanoparticles Decorated Porous Anodic Alumina

Silver nanoparticles (Ag NPs) were successfully assembled in porous anodic alumina (AAO) templates via a green silver mirror reaction. The Ag NPs/AAO composite templates then were characterized by field emission scanning electron microscopy (FESEM), energy-dispersive X-ray microanalysis (EDX), and X-ray diffraction (XRD). Furthermore, the photoluminescence (PL) properties were also investigated. Compared with the blank AAO, the PL intensity of Ag NPs/AAO templates are enhanced and the maximum enhancement is 2.58 times. Based on the local electric field enhancement effect, the theoretical values were also deduced, which are basically coincident with the experimental.

Enhancing exposure depth for surface-plasmon polaritons interference nanolithography by waveguide modulation

A maskless interference device with a waveguide coated thin metal film is investigated for surface-plasmon polaritons interference lithography (SPPIL) in this paper. The focal depth of interference fringes in the resist is modulated obviously by the thicknesses of the waveguide and the metal film, which will solve the question of short exposure depth for conventional SPPIL, and improve the practicability of SPPIL. Simulated and analyzed results demonstrated that the focal depth of interference fringes is increased dramatically with suitable parameters for the structure.

Study of focusing combination of large-caliber coherent laser beams

A focusing combination scheme based on four incident plane waves with a caliber of 290mm is investigated to enhance the peak power of the shooting laser in the ICF fast ignition. Calculated and simulated results indicate that about 67% energy is focused in the center spot using an optimized paraboloidal mirror, and the light peak intensity is enhanced about 13.95x1010 times. Besides, the tolerances of the light spot position and the initial phases are analyzed in detail for experiment.