Directly addressable GaN-based nano-LED arrays: fabrication and electro-optical characterization

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Advancements in display technology drive demand for individually controlled microscale light sources.
• Gallium nitride (GaN) micro-light-emitting diodes (LEDs) show promise but face limitations in fabricating submicron, individually addressable arrays.

Purpose of the Study:

• To present a novel approach for fabricating individually addressable nanoLED arrays with subwavelength pitch.
• To demonstrate the design and fabrication of GaN nanoLEDs for on-chip super-resolution microscopy.

Main Methods:

• Development of nanoLED arrays with direct addressing capabilities.
• Fabrication of two distinct geometries: a 6 × 6 array of 400 nm LEDs and a 2 × 32 line array of 200 nm LEDs.
• Utilizing Gallium nitride (GaN) material properties for nanoLED fabrication.

Main Results:

• Successful fabrication of nanoLED arrays with dimensions below the wavelength of light.
• Demonstrated capability for individual addressing of each nanoLED element.
• GaN nanoLEDs achieved required specifications for integration into super-resolution microscopy.

Conclusions:

• GaN nanoLED arrays offer a viable solution for individually controlled microscale light sources.
• The developed nanoLED technology is suitable for creating novel on-chip super-resolution microscopes.
• GaN's inherent properties make it an ideal platform for advanced nano-optical devices.