title: All-metal flexible large-area multiband waveplate.
abstract: We propose and demonstrate an all-metal flexible reflective multiband waveplate based on nano-grating structure using high efficient electroplating growing process, which exhibits quarter waveplate at two wavelengths (λ = 465nm and λ = 921nm) and half waveplate at another wavelength (λ = 656nm). Using Finite Difference Time Domain (FDTD) modeling, the phase shift and reflection efficiency are simulated and designed for a variety of geometrical parameters. A fast and cost-effective technique based on conventional interference lithography and nickel electroplating process is demonstrated to fabricate the all-metal, large-area and flexible waveplate. Experimental results show that the fabricated monolithic all-metal nano structure of the proposed device are in high fidelity with the structure on template and the optical performance of the device are in excellent agreement with the theoretical prediction. The proposed structure and the fabrication method suggests an effective way to realize all-metal, ultrathin, self-supporting and flexible devices for various applications in rugged environment such as high temperature or high pressure environment, and also in the fast growing fields of flexible (wearable) optoelectronics, flexible displays and other curved or nonplanar devices.
authors.forename: Jingpei
authors.initials: J
authors.lastname: Hu
authors.forename: Yu
authors.initials: Y
authors.lastname: Lin
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Zhao
authors.forename: Aijiao
authors.initials: A
authors.lastname: Zhu
authors.forename: Chen
authors.initials: C
authors.lastname: Xu
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Zhu
authors.forename: Peiji
authors.initials: P
authors.lastname: Guo
authors.forename: Bing
authors.initials: B
authors.lastname: Cao
authors.forename: Chinhua
authors.initials: C
authors.lastname: Wang