Ultrafast Optical Generation of Coherent Bright and Dark Surface Phonon Polaritons in Nanowires,ACS Photonics

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Ultrafast Optical Generation of Coherent Bright and Dark Surface Phonon Polaritons in Nanowires
ACS Photonics ( IF 6.5 ) Pub Date : 2020-07-20 , DOI: 10.1021/acsphotonics.0c00537
Pierre-Adrien Mante ₁ , Sebastian Lehmann , Daniel Finkelstein Shapiro , Kayin Lee ₁ , Jesper Wallentin , Magnus T. Borgström , Arkady Yartsev

Affiliation

The subwavelength confinement and enhanced electric field created by plasmons allow precise sensing and enhanced light–matter interaction. However, the high frequency and short lifetime of plasmons limit the full potential of this technology. It is crucial to find substitutes and to study their dynamics. Here, we propose an experimental approach allowing the time-domain study of surface phonon polaritons. We first build a theoretical framework for the interaction of ultrashort pulses of light with polar materials. We then perform femtosecond pump–probe experiments and demonstrate the generation and time-resolved detection of surface phonon polaritons. By comparing experiments and simulations, we show the presence of both bright and dark modes with quality factors up to 115. We then investigate mode-dependent decay and energy transfer to the environment. Our results offer a platform for the experimental exploration of the dynamics of surface phonon polaritons and of the role of coherence in energy transfer.

中文翻译：

纳米线中相干明亮和黑暗表面声子极化子的超快光学生成

由等离激元产生的亚波长限制和增强的电场允许精确感测并增强光-物质相互作用。但是，等离子体激元的高频率和短寿命限制了该技术的全部潜力。找到替代品并研究其动态至关重要。在这里，我们提出了一种实验方法，可以对表面声子极化子进行时域研究。我们首先为超短光脉冲与极性材料的相互作用建立理论框架。然后，我们执行飞秒泵浦探针实验，并演示了表面声子极化子的产生和时间分辨检测。通过比较实验和仿真，我们可以显示亮模式和暗模式的存在，其品质因数最高可达115。然后，我们研究与模式有关的衰减和能量向环境的转移。我们的结果为表面声子极化子动力学以及相干在能量转移中的作用进行实验探索提供了一个平台。

更新日期：2020-08-19

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