Integrated graphene/ferroelectric films for microwave/THz devices

The main objective of the proposed project is demonstration of the unique potential of integrated graphene/ferroelectric films for use in novel microwave/THz devices. Ferroelectric substrates enhance graphene?s carrier mobility and concentration. Additionally, combination of the unique properties of the graphene and multi functionality of ferroelectrics (i.e. tuneable dielectric, acoustic, optica) open up possibilities for the development of microwave/THz components with new and enhanced functionalities. We propose a novel concept where the graphene is integrated with thin films of ferroelectrics and used as a channel in Field Effect Transistors (FETs) as well as electrodes for tuneable Film Bulk Acoustic wave Resonators (FBARs). In this example the synergy of the graphene/ferroelectric films allow radical improvement of the performances of the transistor and tuneable acoustic resonator. The former is achieved by ferroelectric enhancement of the charge carrier mobility, the latter by using graphene as electrode instead of conventional (i.e. Al, Pt) metals. Graphene FETs (G-FET) with integrated tuneable FBARs is an example of a device with enhanced functionality - it may act as a Voltage Controlled Oscillator (VCO). Alternatively, the interaction of the acoustic waves and electrons in the graphene may be utilised to realise very high frequency acoustic devices working at room temperature.

Participants

Jan Stake (contact)

Professor at Microtechnology and Nanoscience, Terahertz and Millimetre Wave Laboratory

MICHAEL ANDERSSON

Doktorand at Microtechnology and Nanoscience, Terahertz and Millimetre Wave Laboratory

Spartak Gevorgian

Professor at Microtechnology and Nanoscience, Terahertz and Millimetre Wave Laboratory

Andrei Vorobiev

Senior forskare at Microtechnology and Nanoscience, Terahertz and Millimetre Wave Laboratory

Funding

Swedish Research Council (VR)

Funding years 2013–2015

Related Areas of Advance and Infrastructure

Information and Communication Technology

Area of Advance

Nanoscience & Nanotechnology

Area of Advance

Sustainable Development

Chalmers Driving Force

NFL/Myfab (Nanofabrication Laboratory)

Chalmers Research Infrastructure

National Laboratory in Terahertz Characterisation

Chalmers Research Infrastructure

More information

Latest update

2015-12-04