2020 BIST Ignite Project: TeraFox

Modulating properties of matter with light

The TeraFox project received a 2020 BIST Ignite Grant in June 2021. 

Project overview

TMOs (Transition Metal Oxides) are of great interest in science and industry thanks to their unique properties including ferroelectricity (which can change their electrical polarisation when an external voltage is applied, something that can be employed in numerous electronic devices such as memory and electro-mechanical actuators), and superconductivity (which allows an electric current to be conducted without energy dissipation, something of great interest in electric motors and magnetic sensors). Traditionally, attempts to manipulate these properties have been carried out by altering the chemical composition or acting on the structure of the compound. The TeraFox (Terahertz Cavity Engineering of Functional Oxides) project, co-led by Ekaterina Khestanova, a BIST-FBA fellow at ICFO, and David Pesquera, a postdoctoral researcher at ICN2, proposes a completely new approach, using light.

Instead of applying mechanical stress or an electric field, we want to act on the properties of the TMOs by placing them inside a terahertz cavity, where we ‘trap’ the light between two mirrors. This is not visible light, but rather electromagnetic waves of a precise length, with the exact energy to allow us to interact with these materials”, explains Ekaterina Khestanova.

The challenge of this project lies as much in the design and production of the cavity as in its coupling with the TMOs. To succeed would mean having a new, more efficient method to control the functionality and optimise the properties of materials with a wide range of applications, from energy saving and storage to the development of much more precise sensors or the manufacturing of more efficient medical devices and computers.

Project members

Ekaterina Khestanova

ICFO Postdoctoral Researcher & BIST-FBA Fellow
Project Leader

David Pesquera

ICN2 Postdoctoral Researcher
Project Leader

Frank Koppens

ICFO Group Leader & ICREA Professor

Gustau Catalán

ICN2 Group Leader & ICREA Professor

José Santiso

ICN2 Unit Leader

José Manuel Caicedo Roque

ICN2 Research Engineer

Matteo Ceccanti

ICFO PhD Student

Hanan Herzig Sheinfux

ICFO Postdoctoral Researcher

BIST centres


Institutional Members of the Board of Trustees