High-Speed Light-Emitting Diodes Emitting at 500 nm With 463-MHz Modulation Bandwidth

作者：Liao Chien Lan^*; Ho Chong Lung; Chang Yung Fu; Wu Chi Hung; Wu Meng Chyi

来源：IEEE Electron Device Letters, 2014, 35(5): 563-565.

DOI：10.1109/LED.2014.2304513

• High-speed
• green GaN-based LEDs
• 3-dB modulation bandwidth
• plastic optical fiber (POF)
• visible light communication (VLC)

Light-emitting diode (LED) is one of the most important light sources due to its low power consumption and long lifetime. In this letter, we present the high-frequency characteristics of GaN-based green LEDs with different aperture diameters. In order to get higher current density, we use ring-shaped electrode to confine the current injection. Unlike conventional LEDs, we only use its natural feature to get a high modulation bandwidth. The LEDs investigated have a peak emission wavelength of 500 nm. The highest optical 3-dB modulation bandwidth is similar to 463 MHz at 50 mA for the 500-nm green GaN-based LED with an aperture diameter of 75 mu m. It is the highest bandwidth yet reported for the green GaN-based LEDs. The LED also exhibits a relatively high output power of similar to 1.6 mW at 50 mA as compared with other high-speed LEDs. Such the LEDs can be applied to plastic optical fiber and visible light communication in the future.

• 出版日期2014-5
• 单位中国科学院电工研究所; 清华大学