Jin Wang, Meixin Feng, Rui Zhou, Qian Sun, Jianxun Liu, Yingnan Huang, Yu Zhou, Hongwei Gao, Xinhe Zheng, Masao Ikeda, Hui Yang, "GaN-based ultraviolet microdisk laser diode grown on Si," Photonics Res. 7, B32 (2019)

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- Photonics Research
- Vol. 7, Issue 6, B32 (2019)

Fig. 1. (a) Cross-sectional transmission electron microscopy (TEM) image, (b) double crystal X-ray rocking curves for the AlGaN (0002) and (101 ¯ 2) planes of the NUV LD structure grown on Si, and (c) AFM surface image of the AlGaN grown on Si.

Fig. 2. (a), (c) Schematics and (b), (d) SEM images of the (a), (b) microring LD and (c), (d) microdisk LDs with air-bridge electrodes.

Fig. 3. Schematic process flow of the microdisk LD structure with an air-bridge electrode.

Fig. 4. (a) EL spectra of the microdisk LD with a radius of 12 μm measured under various pulsed electrical currents. (b) FWHM of the EL spectra and integrated intensity of the EL spectra as a function of the injection current. The pulse width and repetition rate were 400 ns and 10 kHz, respectively.

Fig. 5. Threshold current, I th, as a function of the inner circle radius for the microring LDs with an outer circle radius, R , of 20 μm.

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