A Vanadium Dioxide Metamaterial Disengaged from Insulator-to-Metal Transition

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• 作者：Young-Gyun Jeong ; Sanghoon Han ; Jiyeah Rhie ; Ji-Soo Kyoung ; Jae-Wook Choi ; Namkyoo Park ; Seunghun Hong ; Bong-Jun Kim ; Hyun-Tak Kim ; Dai-Sik Kim
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：15
• 期：10
• 页码：6318-6323
• 全文大小：372K
• ISSN：1530-6992

文摘

We report that vanadium dioxide films patterned with 位/100000 nanogaps exhibit an anomalous transition behavior at millimeter wavelengths. Most of the hybrid structure鈥檚 switching actions occur well below the insulator to metal transition temperature, starting from 25 掳C, so that the hysteresis curves completely separate themselves from their bare film counterparts. It is found that thermally excited intrinsic carriers are responsible for this behavior by introducing enough loss in the context of the radically modified electromagnetic environment in the vicinity of the nanogaps. This phenomenon newly extends the versatility of insulator to metal transition devices to encompass their semiconductor properties.