Polarization conversion based on plasmonic phase control by an ultra-thin metallic nano-strips
Helei Wei,
Dejiao Hu,
Yunsheng Deng,
Xuannan Wu,
Xiao Xiao,
Yidong Hou,
Yunjiao Wang,
Ruiying Shi,
Deqiang Wang,
Jinglei Du
Affiliations
Helei Wei
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Dejiao Hu
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Yunsheng Deng
Chongqing Key Lab of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, 400714 Chongqing, China
Xuannan Wu
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Xiao Xiao
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Yidong Hou
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Yunjiao Wang
Chongqing Key Lab of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, 400714 Chongqing, China
Ruiying Shi
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Deqiang Wang
Chongqing Key Lab of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, 400714 Chongqing, China
Jinglei Du
College of Physical Science and Technology, Sichuan University, 610064 Chengdu, China
Ultra-thin metallic nano-strips (thinner than skin depth) can lead to anomalous reflection for a transverse magnetic (TM) incidence of some wave-lengths, due to the phase modulation of localized surface plasmon resonance. Based on the principle above, we proposed a method of polarization modulation using ultra-thin metallic nano-strips. When irradiating nano-strips vertically by light with a given polarized angle, we can utilize the phase difference of the TM transmission and transverse electric (TE) transmission near anomalous reflection region to modulate transmission polarization. We have designed and fabricated the ultra-thin metallic nano-strips with the function of quarter-wave plate, the attained transmission Stokes parameter S3 is 0.95. The nano-strips is easy to design and fabricate, also compatible with other optics devices, hence has the potential applications in integrated optics field.
