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Ultrafast Nonlinear Optical Properties of a Graphene Saturable Mirror in the 2 μm Wavelength Region
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2017-09-07 , DOI: 10.1002/lpor.201700166 Gaozhong Wang 1 , Kangpeng Wang 1 , Beata M. Szydłowska 1 , Aidan A. Baker-Murray 1 , Jing Jing Wang 1 , Yanyan Feng 2 , Xiaoyan Zhang 2 , Jun Wang 2 , Werner J. Blau 1
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2017-09-07 , DOI: 10.1002/lpor.201700166 Gaozhong Wang 1 , Kangpeng Wang 1 , Beata M. Szydłowska 1 , Aidan A. Baker-Murray 1 , Jing Jing Wang 1 , Yanyan Feng 2 , Xiaoyan Zhang 2 , Jun Wang 2 , Werner J. Blau 1
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Mid‐infrared ultrafast lasers have emerged as a promising platform for both science and industry because of their inherent high raw power and eye‐safe spectrum. 2D nanostructures such as graphene have emerged as promising photonic materials for laser mode‐locking to generate ultrashort pulses. However, there are still many unanswered questions about graphene's key advantages to be practical devices, especially over the matured semiconductor saturable absorber mirror (SESAM). In this work, we conducted systematic comparisons on the nonlinear optical properties of graphene and that of a commercial SESAM at 2 μm wavelength. Our results showed that graphene has significant advantages over the commercial SESAM, exhibiting ∼28% less absorptive cross‐section ratio of excited‐state to ground‐state and ∼50 times faster relaxation time. This implies that graphene can be exploited as a better mode‐locker than the current commercial SESAM for high power, high repetition rate and ultrafast mid‐infrared laser sources.
中文翻译：
石墨烯饱和镜在2μm波长范围内的超快非线性光学特性
中红外超快激光器由于其固有的高原始功率和人眼安全的光谱，已成为科学和工业领域的有希望的平台。诸如石墨烯之类的二维纳米结构已成为有前途的光子材料，可用于激光锁模以产生超短脉冲。但是，关于石墨烯作为实用设备的关键优势，仍然存在许多悬而未决的问题，尤其是在成熟的半导体可饱和吸收镜（SESAM）之上。在这项工作中，我们对石墨烯和商用SESAM在2μm波长处的非线性光学性质进行了系统的比较。我们的结果表明，石墨烯比市售SESAM具有显着优势，其激发态与基态的吸收截面比降低了约28％，松弛时间加快了约50倍。
更新日期：2017-09-07
中文翻译：
石墨烯饱和镜在2μm波长范围内的超快非线性光学特性
中红外超快激光器由于其固有的高原始功率和人眼安全的光谱，已成为科学和工业领域的有希望的平台。诸如石墨烯之类的二维纳米结构已成为有前途的光子材料，可用于激光锁模以产生超短脉冲。但是，关于石墨烯作为实用设备的关键优势，仍然存在许多悬而未决的问题，尤其是在成熟的半导体可饱和吸收镜（SESAM）之上。在这项工作中，我们对石墨烯和商用SESAM在2μm波长处的非线性光学性质进行了系统的比较。我们的结果表明，石墨烯比市售SESAM具有显着优势，其激发态与基态的吸收截面比降低了约28％，松弛时间加快了约50倍。
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