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arXiv 2302.06307physics.opticsphysics.app-ph
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脉冲驱动的超常光学透射中超快等离激元共振的全光控制

All-Optical Control of Ultrafast Plasmon Resonances in the Pulse-Driven Extraordinary Optical Transmission

Hira Asif, Mehmet Emre Tasgin, Ramazan Sahin

AI总结:

本文提出通过调节超短光脉冲的光谱与时域特性全光控制 EOT 系统中的超快等离激元共振,并结合耦合谐振子模型、3D-FDTD 与小波分析实现 EOT 信号 3 倍增强。

摘要:

在其自然时间尺度上理解超快过程,对于在光与物质相互作用下控制和操控纳米尺度光电器件至关重要。在这里,我们证明,归因于超常光学透射(Extraordinary Optical Transmission,EOT)现象的超快等离激元共振,可以通过调节超短光脉冲的光谱和时间特性而被显著改变。在该方案中,全光主动调节控制着 EOT 系统中等离激元振荡在空间和时间上的增强,而无需对器件进行定制。我们通过两种方法分析该系统的光谱和时间演化。首先,我们建立了一个基于耦合谐振子模型的理论框架,该模型解析地描述了等离激元模式在耦合和非耦合状态下的动力学。随后,我们比较了该系统在连续波和脉冲照明下的演化。此外,我们通过 3D-FDTD 模拟方法和小波变换讨论了等离激元模式的时间分辨光谱与空间动力学。我们的结果表明,对传播型和局域型等离激元模式的振荡时间、强度及光谱特性进行光学调节,可使 EOT 信号获得 3 倍增强。通过超短光脉冲对 EOT 传感器进行主动调节,为开发利用对大量原子和分子系统进行高分辨率成像与传感的片上光子器件铺平了道路。

英文摘要:

Understanding the ultrafast processes at their natural-time scale is crucial for controlling and manipulating nanoscale optoelectronic devices under light-matter interaction. Here, we demonstrate that ultrafast plasmon resonances, attributed to the phenomenon of Extraordinary Optical Transmission (EOT), can be significantly modified by tuning the spectral and temporal properties of the ultrashort light pulse. In this scheme, all-optical active tuning governs spatial and temporal enhancement of plasmon oscillations in the EOT system without device customization. We analyze the spectral and temporal evolution of the system through two approaches. First, we develop a theoretical framework based on the coupled harmonic oscillator model, which analytically describes the dynamics of plasmon modes in the coupled and uncoupled state. Later, we compare the evolution of the system under continuous wave and pulsed illumination. Further, we discuss time-resolved spectral and spatial dynamics of plasmon modes through 3D-FDTD simulation method and wavelet transform. Our results show that optical tuning of oscillation time, intensity, and spectral properties of propagating and localized plasmon modes yields a 3-fold enhancement in the EOT signal. The active tuning of the EOT sensor through ultrashort light pulses pave the way for the development of on-chip photonic devices employing high-resolution imaging and sensing of abundant atomic and molecular systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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