Converting surface plasmon to spatial Airy beam by graded grating on metal surface.
A well-developed phase modulation method is utilized to design a nanogroove grating for a desired diffraction process, which gives rise to the conversion of a surface plasmon wave to an Airy-like radiation beam. Experiments and simulations revealed the unique characteristics of the generated Airy-like beam, such as nonspreading, self-bending, and self-healing. Our result confirms the validation of the diffraction strategy for beam engineering in conversions and possibly indicates wider applications in broader areas.
National Laboratory of Solid State Microstructures, School of Physics, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China.
X M
XM
Tang
L
L
Li
T
T
Li
Q J
QJ
Wang
X J
XJ
Zhang
S N
SN
Zhu
Y Y
YY
Zhu