Performances of blue and green laser diodes（LDs） with different u-InGaN upper waveguides（UWGs） are investigated theoretically by using LASTIP. It is found that the slope efficiency（SE） of blue LD decreases due t...Performances of blue and green laser diodes（LDs） with different u-InGaN upper waveguides（UWGs） are investigated theoretically by using LASTIP. It is found that the slope efficiency（SE） of blue LD decreases due to great optical loss when the indium content of u-InGaN UWG is more than 0.02, although its leakage current decreases obviously. Meanwhile the SE of the green LD increases when the indium content of u-InGaN UWG is varied from 0 to 0.05, which is attributed to the reduction of leakage current and the small increase of optical loss. Therefore, a new blue LD structure with In（0.05） Ga（0.95）N lower waveguide（LWG） is designed to reduce the optical loss, and its slope efficiency is improved significantly.展开更多
基金Project supported by 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)+1 种基金the Science Challenge Project,China(Grant No.TZ2016003)the Beijing Municipal Science and Technology Project,China(Grant No.Z161100002116037)
文摘Performances of blue and green laser diodes（LDs） with different u-InGaN upper waveguides（UWGs） are investigated theoretically by using LASTIP. It is found that the slope efficiency（SE） of blue LD decreases due to great optical loss when the indium content of u-InGaN UWG is more than 0.02, although its leakage current decreases obviously. Meanwhile the SE of the green LD increases when the indium content of u-InGaN UWG is varied from 0 to 0.05, which is attributed to the reduction of leakage current and the small increase of optical loss. Therefore, a new blue LD structure with In（0.05） Ga（0.95）N lower waveguide（LWG） is designed to reduce the optical loss, and its slope efficiency is improved significantly.
