Applying 'magic angle' twistronics to manipulate the flow of light

Dr Qingdong Ou (Monash University) with s-SNOM facility at Melbourne Centre for Nanofabrication (MCN).

  • ‘Twisted’ layers of 2D materials produce photonic topological transition at ‘magic’ rotation angles
  • Principles of Moire-pattern bilayer graphene applied to 2D material photonics for first time

Monash researchers are part of an international collaboration applying ‘twistronics’ concepts (the science of layering and twisting 2D materials to control their electrical properties) to manipulate the flow of light in extreme ways.

The findings, published in the journal Nature, hold the promise for leapfrog advances in a variety of light-driven technologies, including nano-imaging devices; high-speed, low-energy optical computers; and biosensors.

This is the first application of Moiré physics and twistronics to the light-based technologies, photonics and polaritonics, opening unique opportunities for extreme photonic dispersion engineering and robust control of polaritons on 2D materials.

Experimental physicist Dr Qingdong Ou is a research fellow now working with Professor Michael Fuhrer at Monash University to study nano-device fabrication based on 2D materials, within FLEET’s Enabling technology B.

Qingdong seeks to minimise energy losses in light-matter interactions, aiming to realise ultra-low energy consumption in 2D-material-based photonic and optoelectronic devices. He also studies highly-confined low-loss polaritons in 2D materials using near-field optical nano-imaging within FLEET’s Research theme 2.

FLEET is an Australian Research Council Centre of Excellence developing a new generation of ultra-low energy electronics.

For more information about this study, please visit the FLEET website.