(THE GIST OF PIB) Gallium Nitride Nanostructures



(THE GIST OF PIB) Gallium Nitride Nanostructures

(January-2023)

Gallium Nitride Nanostructures



  • Researchers in Bengaluru’s Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), an autonomous institute, have recently shown infrared light emission and absorption with GaN nanostructures.

About Gallium Nitride (GaN) Nanostructures:

  • Blue light emission from GaN has been known for some time, and it is used in LEDs, this is the first time that infrared light-matter interactions are demonstrated in GaN.
  • For this demonstration, they have utilized a scientific phenomenon called surface polariton excitations.

What is surface polariton?

  • These are special modes of electromagnetic waves travelling at the interface of a conductor and an insulator such as air.
  • These are quasi-particles which have both light and matter characteristics.
  • By altering the morphology and shape of the nanostructures, they are also able to excite plasmon polaritons in GaN, which results in extending the light-matter coupling to further reaches of the electromagnetic spectrum. 
  • It is a very hard and mechanically stable wide band gap (WBG) semiconductor, as it has a hexagonal crystal structure. 
  • The critical factors of gallium nitride: Its reliability, compact size, high efficiency, fast switching speed, low on-resistance, and high thermal conductivity.

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Courtesy: PIB