Suppression of electron and hole overflow in GaN-based near-ultraviolet laser diodes<xref rid="cpb_27_2_028101_fn1" ref-type="fn">*</xref><fn id="cpb_27_2_028101_fn1"><label>*</label><p>Project supported by the Science Challenge Project, China (Grant No. Z2016003), the National Key R & D Program of China (Grant Nos. 2016YFB0400803 and 2016YFB0401801), the National Natural Science Foundation of China (Grant Nos. 61674138, 61674139, 61604145, 61574135, 61574134, 61474142, 61474110, 61377020, and 61376089), and the Beijing Municipal Science and Technology Project, China (Grant No. Z161100002116037).</p></fn>

Suppression of electron and hole overflow in GaN-based near-ultraviolet laser diodes**

Project supported by the Science Challenge Project, China (Grant No. Z2016003), the National Key R & D Program of China (Grant Nos. 2016YFB0400803 and 2016YFB0401801), the National Natural Science Foundation of China (Grant Nos. 61674138, 61674139, 61604145, 61574135, 61574134, 61474142, 61474110, 61377020, and 61376089), and the Beijing Municipal Science and Technology Project, China (Grant No. Z161100002116037).

Xing Yao^{1, 2}, Zhao De-Gang^{1, 3, †}, Jiang De-Sheng¹, Li Xiang¹, Liu Zong-Shun¹, Zhu Jian-Jun¹, Chen Ping¹, Yang Jing¹, Liu Wei¹, Liang Feng¹, Liu Shuang-Tao¹, Zhang Li-Qun⁴, Wang Wen-Jie⁵, Li Mo⁵, Zhang Yuan-Tao⁶, Du Guo-Tong⁶

(color online) (a) Curves of voltage and output power versus current injection of ultraviolet LDs with different Al compositions of Al_xGa_1−xN EBL; (b) curves of threshold current (black line) and output power (red line) versus Al composition of Al_xGa_1−xN EBL at a fixed current of 120 mA when the Al composition of Al_xGa_1−xN EBL varies from 0.2 to 0.3.