A wafer-scale graphene and ferroelectric multilayer for flexible and fast-switched modulation applications. Issue 35 (18th August 2015)

• Record Type: Journal Article
• Authors: Zhu, Minmin; Wu, Jing; Du, Zehui; Tay, Roland Yingjie; Li, Hongling; Özyilmaz, Barbarous; Teo, Edwin Hang Tong
• Is Part Of: Nanoscale. Volume 7:Issue 35(2015)
• Page Start: 14730
• Page End: 14737
• Publication Date: 2015-08-18
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr03020j
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Here we report a wafer-scale graphene/P(VDF-TrFE)/graphene multilayer for light-weight, flexible and fast-switched broadband modulation applications. Abstract : Here we report a wafer-scale graphene/P(VDF-TrFE)/graphene multilayer for light-weight, flexible and fast-switched broadband modulation applications. The P(VDF-TrFE) film not only significantly reduces the sheet resistance of graphene throughout heavy doping of ∼0.8 × 10 13 cm −2 by nonvolatile ferroelectric dipoles, but also acts as an efficient electro-optic (EO) layer. Such multilayered structural integration with remarkable ferroelectric polarization, high transparency (>90%), low sheet resistance (∼302 Ω □ −1 ), and excellent mechanic flexibility shows the potential of a flexible modulation application over a broad range of wavelengths. Moreover, the derived device also exhibits strong field-induced EO modulation even under bending and one large Pockels coefficient (∼54.3 pm V −1 ) is obtained. Finally, the graphene and ferroelectric hybrid demonstrates a fast switching time (∼2 μs) and works well below low sheet resistance level over a long time. This work gives insights into the potential of graphene and ferroelectric hybrid structures, enabling future exploration on next-generation high-performance, flexible transparent electronics and photonics.