(a) and (b) show the SEM pictures of silver thin films before and after annealing. (c) The AFM picture of the annealed film shows that the size of the silver nanoparticle is .
(a) The CLC cell with silver nanoparticles distributed on one plate of the cell and (b) the CLC grating structure well formed with the application of a proper voltage to the cell.
CLC grating structure was observed with an optical microscope and the diffraction pattern shown on top (probed by the He–Ne laser of 632.8 nm).
The first-order diffraction efficiency vs wavelength of the CLC grating with and without the silver nanoparticles distributed on one plate of the cell, and the absorbance of the silver nanoparticles covered with E7 LC is shown in the inset illustration.
Theoretical absorbance of silver nanoparticles surrounded by the environment with refractive indices of 1.52 and 1.74. The inset shows the silver nanoparticles layer was posited between the CLC grating and ITO plate. The particles experienced the environments with indices of and .
Theoretical diffraction efficiencies show the extra diffraction band of CLC grating with silver nanoparticles.
Article metrics loading...
Full text loading...