Color‐Sensitive Ultrafast Optical Modulation and Switching of Terahertz Plasmonic Devices,Advanced Optical Materials

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Color‐Sensitive Ultrafast Optical Modulation and Switching of Terahertz Plasmonic Devices
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-05-31 , DOI: 10.1002/adom.201800030
Abhishek Kumar _{1,

2} , Yogesh Kumar Srivastava _{1,

2} , Manukumara Manjappa _{1,

2} , Ranjan Singh _{1,

2}

Affiliation

2D micro‐nanostructured metal films with hole arrays show promising features such as the extraordinary transmission of light. Such systems are interesting in the field of subwavelength photonics and nonlinear optics due to their high field confinement in addition to their inherent spectral scalability and frequency selective response. Several active schemes to control the extraordinary transmission are recently demonstrated. However, these dynamic devices do not reveal any obvious color‐dependent modulation of the resonant transmission behavior. Here, color‐sensitive ultrafast modulation of extraordinary resonant transmission of terahertz (THz) waves through 2D metallic hole arrays is demonstrated. Pumping the silicon beneath the metallic array with light of different colors and identical fluences exhibit significantly different ultrafast switching dynamics and modulation. The color‐dependent sensitivity and control of THz waves at an ultrafast timescale provide an extra degree of freedom that opens up new opportunities for future applications in active subwavelength optics, optoelectronics, and all‐optical switching of THz photonic devices.

中文翻译：

太赫兹等离子设备的色敏超快光学调制和切换

具有孔阵列的2D微纳米结构金属膜显示出令人鼓舞的特性，例如非凡的光透射率。这样的系统除了具有固有的频谱可扩展性和频率选择性响应外，还由于其对磁场的高度限制，因此在亚波长光子学和非线性光学领域引起了人们的关注。最近展示了几种控制异常传输的主动方案。但是，这些动态设备没有显示出任何明显的颜色依赖于共振传输行为的调制。在此，演示了通过2D金属孔阵列对太赫兹（THz）波的非凡共振传输的色彩感应超快调制。用不同颜色和相同通量的光将金属阵列下方的硅泵浦会表现出明显不同的超快开关动力学和调制。取决于颜色的灵敏度和超快时间范围内的太赫兹波控制提供了额外的自由度，为将来在有源次波长光学器件，光电和太赫兹光子器件的全光开关中的应用开辟了新的机遇。

更新日期：2018-05-31

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