Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, People's Republic of China.
Nanotechnology. 2013 May 31;24(21):214003. doi: 10.1088/0957-4484/24/21/214003. Epub 2013 Apr 25.
Plasmon induced transparency (PIT) could be realized in metamaterials via interference between different resonance modes. Within the sharp transparency window, the high dispersion of the medium may lead to remarkable slow light phenomena and an enhanced nonlinear effect. However, the transparency mode is normally localized in a narrow frequency band, which thus restricts many of its applications. Here we present the simulation, implementation, and measurement of a broadband PIT metamaterial functioning in the terahertz regime. By integrating four U-shape resonators around a central bar resonator, a broad transparency window across a frequency range greater than 0.40 THz is obtained, with a central resonance frequency located at 1.01 THz. Such PIT metamaterials are promising candidates for designing slow light devices, highly sensitive sensors, and nonlinear elements operating over a broad frequency range.
等离子体诱导透明（PIT）可通过不同共振模式之间的干涉在超材料中实现。在透明窗口内，介质的高色散可能导致显著的慢光现象和增强的非线性效应。然而，透明模式通常局限于较窄的频带内，这限制了其许多应用。本文提出了在太赫兹频段工作的宽带 PIT 超材料的模拟、实现和测量。通过在中心棒谐振器周围集成四个 U 形谐振器，获得了跨越大于 0.40THz 的频率范围的宽带透明窗口，中心共振频率位于 1.01THz。这种 PIT 超材料有望成为设计工作在宽频带上的慢光器件、高灵敏度传感器和非线性元件的候选者。
