Control of sideband scattering via a time-varying meta-device

ANU and UNSW researchers have developed a time-varying meta-device that enables the frequency, scattering directionality, phase and efficiency of electromagnetic (EM) sideband waves to be manipulated in a real-time and arbitrary manner.

Background

Sideband generation is a fundamental process that occurs in various systems, from the atomic level to macroscopic level, where dynamic modulation of electromagnetic waves exists. Huygen's metasurfaces allow almost arbitrary wave front shaping, however dynamic and arbitrary control of the amplitude and phase response remains problematic.

Technology

ANU researchers have developed a new paradigm based on a time-varying meta-device that enables arbitrary parametric wave control. The dynamic Huygens' metasurface consists of both electric and magnetic meta-atoms with independently controlled modulation via external stimuli.

Advantages:

  • Compact - provides spatial control (not spectral control) of sidebands using a compact resonant device
  • Frequency-demultiplexed functionality - can scatter different sidebands in different directions or in different patterns
  • Switching of directionality - can change sideband directionality on the same device, i.e. can function as a transmissive or reflective device
  • Huge steering angle - can achieve 360° sideband beam control/steering
  • Flexible frequency bands - can be designed to work over several frequency bands (currently designed to work within the microwave band)
  • High power conversation efficiency - highly efficient sideband conversation (>75%)
  • One feed source - only have to use one feed source, rather than multiple sources for applications such as radar sensing and phased array antenna

Opportunity

ANU is seeking engagement with prospective industry partners and/or licensees interested in establishing a collaboration for the future development and/or bringing-to-market this time-varying meta-device. ANU is well-placed to work with partners to optimise the meta-device for their specification application and functionality requirements.