High bandwidth series-biased green micro-LED array toward 6 Gbps visible light communication

Area of Science:

• Optoelectronics
• Solid-state lighting
• Wireless communication

Background:

• Micro light-emitting diodes (micro-LEDs) are crucial for high-speed optical communication.
• Achieving high modulation bandwidth in green micro-LEDs is essential for visible light communication (VLC).

Purpose of the Study:

• To demonstrate a record modulation bandwidth in c-plane polar green micro-LEDs.
• To achieve a high data rate for visible light communication using micro-LEDs.

Main Methods:

• Fabrication of a 10 µm c-plane green micro-LED.
• Characterization of modulation bandwidth at high current density (41.4 kA/cm²).
• Design of a series-biased 20 µm micro-LED with orthogonal frequency division multiplexing (OFDM).

Main Results:

• A record modulation bandwidth of 1.31 GHz was achieved for the 10 µm green micro-LED.
• A maximum data rate of 5.789 Gbps was achieved using a series-biased 20 µm micro-LED with OFDM.
• Successful free-space transmission over 0.5 m was demonstrated.

Conclusions:

• C-plane polar green micro-LEDs show significant potential for ultrahigh-speed visible light communication.
• The achieved data rates and bandwidths pave the way for high-performance wireless optical systems.
• This research highlights the viability of micro-LEDs in next-generation wireless communication technologies.