On-chip GaN-based dual-color micro-LED arrays and their application in visible light communication

Area of Science:

• Optoelectronics
• Materials Science
• Communications Engineering

Background:

• Micro-light emitting diode (micro-LED) arrays are established for display technologies.
• The application of micro-LEDs in visible light communication (VLC) remains underexplored.
• Developing efficient and high-speed VLC transmitters is crucial for next-generation wireless networks.

Purpose of the Study:

• To fabricate and characterize on-chip dual-color micro-LED arrays.
• To evaluate the performance of these dual-color micro-LED arrays as visible light communication (VLC) transmitters.
• To demonstrate the feasibility of using dual-color micro-LEDs for high-speed data transmission.

Main Methods:

• Fabrication of dual-color micro-LED arrays using transfer printing techniques.
• Integration of blue-emitting micro-LEDs with green and violet micro-LED substrates.
• Characterization of optical properties and communication performance of the fabricated arrays.
• Implementation of a dual wavelength multiplexing scheme for data transmission.

Main Results:

• Successful fabrication of blue-green and blue-violet on-chip dual-color micro-LED arrays.
• Demonstration of error-free data transmission capabilities.
• Achieved data rates of 1.79 Gbps for blue-green micro-LEDs.
• Achieved data rates of 3.35 Gbps for blue-violet micro-LEDs using dual wavelength multiplexing.

Conclusions:

• Dual-color micro-LED arrays show significant promise as efficient VLC transmitters.
• The transfer printing method enables the creation of integrated multi-color micro-LEDs for communication.
• High data rates achieved highlight the potential for advanced VLC applications.