Hao Liu , Chen Jiang , Shuaicheng Liu , Jihong Ye , Hao Zhai , Jian Li , Jun Wang , Qi Wang , Xin Wei , Xiaomin Ren
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引用次数: 0
摘要
作为对位错敏感的发光器件,在硅衬底上单片生长的量子阱激光器与在原生衬底上生长的量子阱激光器相比,工作性能较差。在这项工作中,通过使用联合位错减少方法,实现了穿线位错密度低至 8.9 × 106/cm2 的砷化镓/硅虚拟衬底。同时,通过在上下 AlGaAs 包层中分别插入两个含 In 的应变层,有源区几乎不存在滑动位错。随着有源区位错的减少,制备出的硅基宽条纹脊状激光器在室温下表现出连续波激光,并实现了 1015 A/cm2 的低阈值电流密度、90 ℃ 的高工作温度以及超过 87.25 h 的器件寿命。这些结果证明了优化硅基 InGaAs/AlGaAs 量子阱激光器的实验可行性,并进一步推动了单片集成的研究。
Reducing dislocations for room-temperature continuous-wave InGaAs/AlGaAs multiple quantum well lasers monolithically grown on Si
As dislocation-sensitive light-emitting devices, quantum well lasers monolithically grown on Si substrates operate poorly compared to their counterparts on native ones. In this work, a GaAs/Si virtual substrate with a low threading dislocation density of 8.9 × 106/cm2 was achieved by using a combined dislocation-reducing method. Meanwhile, by using two In-containing strained layer separately inserted into upper and lower AlGaAs cladding layers, the active region was virtually free of gliding dislocations. With the reduced dislocations in the active region, the fabricated Si-based broad-stripe ridged lasers exhibited continuous-wave lasing at room temperature, and a low threshold current density of 1015 A/cm2, high operation temperature of 90 °C as well as a device lifetime of over 87.25 h were achieved. These results demonstrate an experimentally feasible way to optimize a Si-based InGaAs/AlGaAs quantum well laser and further promote the research on monolithic integration.
期刊介绍:
Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.