Photonic band gap effect and structural color from silver nanoparticle gelatin emulsion.
We have fabricated planar structures of silver nanoparticles in monochromatic gelatin emulsion with a continuous spacing ranging from 0.15-0.40 micron using a two-beam interference of a single laser source. Our planar holograms display a colorful "rainbow" pattern and photonic bandgaps covering the visible and IR ranges. We model the planar silver nanoparticle-gelatin composite system using an effective medium approach and good agreement is obtained between theory and experiment.
Kok
Mang Hin
MH
Department of Physics and Institute of Nano Science and Technology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Ma
Rui
R
Lee
Jeffrey Chi Wai
JC
Tam
Wing Yim
WY
Chan
C T
CT
Sheng
Ping
P
Cheah
Kok Wai
KW