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首页> 外文会议>Terahertz, RF, millimeter, and submillimeter-wave technology and applications VI >Metamaterial Films as Narrowband Terahertz Emitters
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Metamaterial Films as Narrowband Terahertz Emitters

机译：超材料薄膜作为窄带太赫兹发射器

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Continued progress in terahertz (THz) research has emphasized the need for both improved THz sources and detectors. One approach to generate a narrowband THz radiation is to use metamaterial absorbers as thermal emitters. We present metamaterial based THz emitters consisting of a 100 ran aluminum layer patterned into squares separated from a ground plane of aluminum by a thin layer of silicon oxide (＜2 μm) fabricated using standard microfabrication techniques. These metamaterials were designed to emit in one, two, and three different bands of the 4-8 THz range and demonstrate clearly definable separate peaks with bandwidths of approximately 1 THz. Modifying the multiple band configurations can produce relatively broad emission peak if desired. Single band emitters designed for 4.1, 5.4, and 7.8 THz were observed to emit, respectively, 11,18, and 36 W/m~2 at 400 ℃ in accordance with Kirchhoff s law of thermal radiation. Coating a 4-inch wafer with these materials and heating it to 400 ℃ would produce an estimated 86, 145, and 280 mW of power, respectively. Additionally, emitted power increased linearly with temperature, as expected from the Planck's radiation law in the THz spectral region at elevated temperatures. Emissivity of the metamaterial did not change significantly when heated, indicating that the constituent materials did not significantly change their optical or geometric properties.
机译：太赫兹（THz）研究的持续进展强调了对改进的THz源和检测器的需求。产生窄带太赫兹辐射的一种方法是使用超材料吸收体作为热辐射体。我们介绍了基于超材料的太赫兹发射器，该发射器由100纳米铝层组成，这些铝层被图案化为正方形，并通过使用标准微细加工技术制造的氧化硅薄层（＜2μm）与铝的接地平面隔开。这些超材料被设计为在4-8 THz范围的一个，两个和三个不同的波段中发射，并显示出清晰可辨的单独峰值，带宽约为1 THz。如果需要，修改多频带配置可以产生相对较宽的发射峰。根据基尔霍夫热辐射定律，观察到为4.1、5.4和7.8 THz设计的单波段发射器在400℃下分别发射11,18和36 W / m〜2的光。用这些材料涂覆一个4英寸的晶片并将其加热到400℃，将分别产生大约86、145和280 mW的功率。此外，正如普朗克辐射定律在高温下在THz频谱区域中所预期的那样，发射功率随温度线性增加。当加热时，超材料的发射率没有明显改变，表明组成材料没有显着改变其光学或几何性质。

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