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Bistable physical geometries for terahertz plasmonics using shape memory alloys

机译:使用形状记忆合金的太赫兹等离子体激元的双稳态物理几何形状

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We demonstrate the applicability of shape memory alloys for creating THz plasmonic structures that can be reversibly reconfigured. This is accomplished by training nickel titanium alloy free-standing foils to have two bistable temperatures between which the physical structure can be switched thermally. Specifically, we show that the metal foil can be switched between a flat foil and one that has either a one-dimensional or two-dimensional corrugation. By perforating the metal foil with a periodic array of subwavelength apertures, we show the transmission spectrum can be thermally switched easily.
机译:我们演示了形状记忆合金在创建可逆地重新配置的THz等离子体结构中的适用性。这是通过训练镍钛合金独立箔具有两个双稳态温度来实现的,在两个双稳态温度之间可以热切换物理结构。具体而言,我们表明金属箔可以在平坦箔和具有一维或二维波纹的箔之间切换。通过用亚波长孔径的周期性阵列对金属箔进行穿孔,我们显示出可以轻松地热切换透射光谱。

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