Microscopic mechanism for transient population inversion and optical gain in graphene

Torben Winzer; Ermin Malic; Andreas Knorr

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Microscopic mechanism for transient population inversion and optical gain in graphene

机译：石墨烯中瞬态总体反转和光学增益的微观机理

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Based on microscopic calculations, we predict a transient femtosecond population inversion in graphene suggesting graphene as a new active gain material covering a broad frequency range. In this paper, we microscopically shed light on the underlying elementary many-particle processes: Transient gain and population inversion occur due to an interplay of strong optical pumping and carrier cooling that fills states close to the Dirac point giving rise to a relaxation bottleneck. The subsequent femtosecond decay of the optical gain is mainly driven by Coulomb-induced Auger recombination. Our findings are in excellent agreement with recent experimental data.

机译：基于微观计算，我们预测了石墨烯中的飞秒飞跃人口反转，这表明石墨烯是一种覆盖广泛频率范围的新型有源增益材料。在本文中，我们从微观上阐明了潜在的基本多粒子过程：瞬态增益和粒子数反转的发生是由于强光泵浦和载流子冷却的相互作用，填充了接近狄拉克点的状态，从而导致了弛豫瓶颈。光学增益随后的飞秒衰减主要是由库仑诱导的俄歇复合驱动的。我们的发现与最近的实验数据非常吻合。

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来源
《Physical review》 |2013年第16期|165413.1-165413.4|共4页
作者
Torben Winzer; Ermin Malic; Andreas Knorr;
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作者单位

Institut fuer Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universitaet Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany;

Institut fuer Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universitaet Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany;

Institut fuer Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universitaet Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany;

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关键词
stimulated emission;

机译：受激发射;

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专利

1. Observation of transient gain without population inversion in a laser-cooled rubidium Lambda system - art. no. 055801 [J] . de Echaniz SR., Durrant AV., Segal DM., Physical Review, A. Atomic, molecular, and optical physics . 2001,第5期

机译：在激光冷却的La Lambda系统中观察瞬态增益而无种群反转没有。 055801
2. Dynamics of the time-resolved stimulated Raman scattering spectrum in presence of transient vibronic inversion of population on the example of optically excited trans-β-apo-8'-carotenal [J] . T. M. Karda?, B. Ratajska-Gadomska, A. Lapini, The Journal of Chemical Physics . 2014,第20期

机译：瞬态电子反转存在下时间分辨受激拉曼散射光谱的动力学-以光激发反式-β-apo-8'-胡萝卜素为例
3. Ultrafast nonlinear optical response of photoexcited Ge/SiGe quantum wells: Evidence for a femtosecond transient population inversion [J] . C. Lange, N. S. Koester, S. Chatterjee, Physical review . 2009,第20期

机译：Ge / SiGe量子阱的超快非线性光学响应：飞秒瞬态总体反转的证据
4. Optical Excitation of Graphene, Population Inversion, and Terahertz Lasing [C] . V. Ryzhii, M. Ryzhii, A. Satou, International Conference on Narrow Gap Systems . 2011

机译：石墨烯的光学激发，人口倒置和太赫兹激光
5. Cellular mechanisms for transient gain adjustment in the inferior colliculus. [D] . Miko, Ilona Julianna. 2005

机译：下眼胶瞬态增益调节的细胞机制。
6. Mechanisms of Spontaneous Curvature Inversion in Compressed Graphene Ripples for Energy Harvesting Applications via Molecular Dynamics Simulations [O] . James M. Mangum, Ferdinand Harerimana, Millicent N. Gikunda, 2021

机译：通过分子动力学模拟对压缩石墨烯涟漪涟漪涟漪涟漪涟漪的机制
7. Microscopic mechanism for transient population inversion and optical gain in graphene [O] . Winzer, Torben, Malic, Ermin, Knorr, Andreas 2012

机译：瞬态粒子数反转和光学的微观机制获得石墨烯
8. Measurement of Population Inversions and Gain in Carbon Fiber Plasmas [R] . Milchberg, H., Skinner, C. H., Suckewer, S., 1985

机译：碳纤维等离子体中粒子数反转和增益的测量

Microscopic mechanism for transient population inversion and optical gain in graphene

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