III-nitride nanowire heterostructure: an emerging solution for next generation all-color solid state light sources
Soumyadip Chatterjee1, Subhranshu Sekhar Sahu1, Swagata Bhunia2
1Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India.
Nanotechnology
|May 18, 2026
Summary
Indium Gallium Nitride/Gallium Nitride (InGaN/GaN) nanowire heterostructures offer advanced visible and ultraviolet optoelectronics. This review covers fabrication, characteristics, and applications of these promising nanowire devices.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Conventional planar III-nitride devices face limitations in visible and ultraviolet optoelectronics.
- Indium Gallium Nitride/Gallium Nitride (InGaN/GaN) nanowire heterostructures present a novel 3D geometry for enhanced performance.
Purpose of the Study:
- To review recent advancements in InGaN/GaN nanowire light-emitting diodes and lasers.
- To discuss fabrication, characteristics, and potential applications of these nanowire structures.
Main Methods:
- Summarizing bottom-up and top-down fabrication strategies for InGaN/GaN nanowires.
- Analyzing control over nanowire composition and morphology.
- Investigating processing of axial and radial device structures.
Main Results:
- 3D geometry of nanowires relaxes strain and reduces electric fields, enabling high-In-content active regions.
- Discussion of electrical and optical characteristics, including efficiency and carrier dynamics.
- Exploration of surface effects, passivation strategies, and novel nanowire laser cavity designs.
Conclusions:
- InGaN/GaN nanowire heterostructures are a promising platform for next-generation optoelectronics.
- Further research into surface phenomena and advanced device designs is crucial for realizing their full potential.
