In News
- Recently, researchers at Bengaluru’s Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) have discovered a new material called single-crystalline scandium nitride (ScN) that can convert infrared light into renewable energy.
About Single-crystalline scandium nitride (ScN)
- Utility:
- ScN can emit, detect, and modulate infrared light with high efficiency making it useful for solar and thermal energy harvesting and for optical communication devices.
- Gallium nitride (GaN): belonging to the same family of materials as gallium nitride (GaN), scandium nitride is compatible with modern complementary-metal-oxide-semiconductor (CMOS) or Si-chip technology and, therefore, could be easily integrated for on-chip optical communication devices.
- Methodology:
- Scientists use high-tech methods to manipulate such waves precisely in dimensions that are thousands of times smaller than human hair, using specialised materials.
- Polariton excitations: The panel of researchers utilised a scientific phenomenon called polariton excitations that occur in tailored materials when light couples with either the collective free electron oscillations or polar lattice vibrations to achieve this feat.
- Issue:
- Not all the wavelengths of light (electromagnetic waves) are easy to utilise, especially infrared light since it is difficult to detect and modulate.
- Significance of Electromagnetic waves:
- It is a renewable energy source used for electricity generation, telecommunication, defence and security technologies, sensors, and healthcare services.
Source: PIB
