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GHz bandwidth semipolar (112¯2) InGaN/GaN light-emitting diodes
Optics Letters
|December 16, 2016
Summary
Semipolar (112¯2) InGaN/GaN light-emitting diodes (LEDs) achieve 1 GHz modulation bandwidth. These LEDs demonstrate suitability for high-speed visible-light communication, reaching data rates over 2.4 Gbps.
Area of Science:
- Optoelectronics
- Materials Science
- Semiconductor Devices
Background:
- Visible-light communication (VLC) demands high-speed optical modulation.
- Semipolar (112¯2) InGaN/GaN light-emitting diodes (LEDs) offer potential for VLC due to their unique material properties.
- Achieving high modulation bandwidths in LEDs is crucial for high-speed data transmission.
Purpose of the Study:
- To investigate the modulation bandwidth of non-mesa-etched semipolar (112¯2) InGaN/GaN LEDs.
- To assess the suitability of these LEDs for high-speed data transmission in visible-light communication (VLC) applications.
- To demonstrate high data rates using a standard modulation scheme.
Main Methods:
- Growth of high-quality (112¯2) GaN templates on patterned (101¯2) r-plane sapphire substrates.
- Fabrication of non-mesa-etched semipolar (112¯2) InGaN/GaN LEDs.
- Measurement of the frequency response (modulation bandwidth) of the fabricated LEDs.
- Demonstration of data transmission using a non-return-to-zero on-off keying (NRZ-OOK) modulation scheme.
Main Results:
- The semipolar (112¯2) InGaN/GaN LEDs exhibited a -3 dB modulation bandwidth of up to 1 GHz.
- A high back-to-back data transmission rate exceeding 2.4 Gbps was achieved.
- The performance indicates the viability of these LEDs for gigabit-per-second data transmission.
Conclusions:
- Non-mesa-etched semipolar (112¯2) InGaN/GaN LEDs possess a significant modulation bandwidth suitable for high-speed applications.
- These LEDs are promising candidates for future visible-light communication (VLC) systems requiring gigabit-per-second data rates.
- The results highlight the potential of semipolar GaN-based LEDs for advanced optical wireless communication.
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