Narrow-Linewidth GaN-on-Si Laser Diode with Slot Gratings.
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| Title: | Narrow-Linewidth GaN-on-Si Laser Diode with Slot Gratings. |
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| Authors: | Tang, Yongjun1,2 (AUTHOR) xjsun2018@sinano.ac.cn, Feng, Meixin1,2,3 (AUTHOR) jxliu2018@sinano.ac.cn, Liu, Jianxun1,2,3 (AUTHOR) szfan2020@sinano.ac.cn, Fan, Shizhao1,2 (AUTHOR) smzhang2010@sinano.ac.cn, Sun, Xiujian2,3 (AUTHOR), Sun, Qian1,2,3 (AUTHOR) hyang2006@sinano.ac.cn, Zhang, Shuming1,2,3 (AUTHOR), Liu, Tong4 (AUTHOR) tliu2015@sinano.ac.cn, Kong, Yaping4 (AUTHOR) ypkong2020@sinano.ac.cn, Huang, Zengli4 (AUTHOR) zlhuang2008@sinano.ac.cn, Ikeda, Masao2 (AUTHOR), Yang, Hui1,2,3,4 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Nov2021, Vol. 11 Issue 11, p3092-3092. 1p. |
| Subjects: | Quantum cascade lasers, Semiconductor lasers, Stray currents, Plasma etching, Ammonium hydroxide, Distributed feedback lasers |
| Abstract: | This letter reports room-temperature electrically pumped narrow-linewidth GaN-on-Si laser diodes. Unlike conventional distributed Bragg feedback laser diodes with hundreds of gratings, we employed only a few precisely defined slot gratings to narrow the linewidth and mitigate the negative effects of grating fabrication on the device performance. The slot gratings were incorporated into the ridge of conventional Fabry-Pérot cavity laser diodes. A subsequent wet etching in a tetramethyl ammonium hydroxide solution not only effectively removed the damages induced by the dry etching, but also converted the rough and tilted slot sidewalls into smooth and vertical ones. As a result, the threshold current was reduced by over 20%, and the reverse leakage current was decreased by over three orders of magnitude. Therefore, the room-temperature electrically pumped narrow-linewidth GaN-on-Si laser diode has been successfully demonstrated. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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