High brightness and broad modulation bandwidth InGaN-based red micro-LEDs integrated with plasmonic gratings
Optics Letters
|May 23, 2023
Summary
We developed efficient red micro-LEDs using plasmonic gratings. These devices achieve high external quantum efficiency and broad modulation bandwidth, ideal for advanced displays and visible light communication.
Area of Science:
- Optoelectronics
- Materials Science
Background:
- Micro-light-emitting diodes (micro-LEDs) are crucial for advanced display technologies and visible light communication (VLC).
- Enhancing the efficiency and modulation speed of red micro-LEDs remains a key challenge for practical applications.
Purpose of the Study:
- To design and investigate red micro-LEDs integrated with plasmonic gratings.
- To improve the efficiency and modulation bandwidth of red micro-LEDs.
- To reduce crosstalk between adjacent micro-LEDs.
Main Methods:
- Integration of red micro-LEDs with plasmonic gratings.
- Utilizing strong coupling between surface plasmons and multiple quantum wells.
- Analysis of far-field emission patterns to assess crosstalk.
Main Results:
- Achieved significant enhancement in Purcell factor (up to 5.1) and external quantum efficiency (EQE) (up to 11%) for individual devices.
- Demonstrated efficient alleviation of crosstalk between adjacent micro-LEDs due to high-divergence far-field emission.
- Predicted a 3-dB modulation bandwidth of approximately 528 MHz for the designed red micro-LEDs.
Conclusions:
- Plasmonic grating integration effectively boosts the performance of red micro-LEDs.
- The proposed design offers a pathway to high-efficiency and high-speed micro-LEDs.
- Results are promising for next-generation light display and visible light communication systems.
