Femtosecond laser upgrading the quality of bismuth films to enhance ultra-broadband photodetection

doi:10.1364/OE.482018

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	Femtosecond laser upgrading the quality of bismuth films to enhance ultra-broadband photodetection
	Y. Lin; S. Chen; C. Xu; Z. Fan; T. Zou; D. Sun and J. Yang
	2023
发表期刊	Optics Express
ISSN	10944087
卷号	31 期号:6 页码:9515-9525
摘要	Topological insulator bismuth has attracted considerable attention for the fabrication of room-temperature, wide bandwidth, and high-performance photodetectors due to the gapless edge state and insulating bulk state properties. However, both the photoelectric conversion and carrier transportation of the bismuth films are extremely affected by the surface morphology and grain boundaries to limit optoelectronic properties further. Here, we demonstrate a strategy of femtosecond laser treatment for upgrading the quality of bismuth films. After the treatment with proper laser parameters, the measurement of average surface roughness can be reduced from Ra = 44 nm to 6.9 nm, especially with accompany of the evident grain boundary elimination. Consequently, the photoresponsivity of the bismuth films increases approximately 2 times within an ultra-broad spectrum range from the visible to mid-infrared. This investigation suggests that the femtosecond laser treatment can help to benefit the performance of topological insulator ultra-broadband photodetectors. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
DOI	10.1364/OE.482018
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收录类别	sci ; ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67679
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Y. Lin,S. Chen,C. Xu,et al. Femtosecond laser upgrading the quality of bismuth films to enhance ultra-broadband photodetection[J]. Optics Express,2023,31(6):9515-9525.
APA	Y. Lin,S. Chen,C. Xu,Z. Fan,T. Zou,&D. Sun and J. Yang.(2023).Femtosecond laser upgrading the quality of bismuth films to enhance ultra-broadband photodetection.Optics Express,31(6),9515-9525.
MLA	Y. Lin,et al."Femtosecond laser upgrading the quality of bismuth films to enhance ultra-broadband photodetection".Optics Express 31.6(2023):9515-9525.

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