GUWAHATI: Researchers from the Indian Institute of Technology Guwahati and Imperial College London, UK have developed a tailored ‘meta-grid’ of nanoparticles that could make light-emitting diodes (LEDs) brighter, energy-efficient and durable.
‘Meta-grid’ or ‘metamaterial grid’ is a specifically patterned array (grid) of nanoparticles acting as metamaterials, capable of exhibiting extraordinary optical properties.
In today’s world, LEDs are deployed almost everywhere— from traffic lights to backlighting for electronic displays, smartphones, large billboards, decorative lightings, water purification, and decontamination of infected surfaces. An increase in LED light output would significantly reduce energy needs on a large scale, and therefore, will contribute towards curbing global warming and climate change.
The IIT Guwahati authority in its official statement said, “Dr Debabrata Sikdar, Assistant Professor, from IIT Guwahati, along with Prof. Sir John B. Pendry and Prof. Alexei A. Kornyshev from Imperial College London, has developed a nanoparticle ‘meta-grid’, which needs to be placed at an appropriate location within the epoxy casing of the LEDs, for improving light output from LEDs.”
According to the statement, the findings have been recently published in Light: Science & Applications journal of the Nature Publishing Group.
“The technique has revealed optimal design parameters for such meta-grids to produce greater light output over any narrow/broadband emission spectrum, besides boosting LEDs’ lifetime by eliminating heating of the chip from unwanted reflections within the chip,” the statement further said.