Modulated optical transmission of subwavelength hole arrays in metal-VO2 films
Modulated optical transmission of subwavelength hole arrays in metal-VO2 films
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DOI：
10.1063/1.2190463
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发表时间：
2006-03
影响因子：
4
通讯作者：
J. Suh;E. U. Donev;R. Lopez;L. Feldman;R. Haglund
中科院分区：
文献类型：
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作者：
J. Suh;E. U. Donev;R. Lopez;L. Feldman;R. Haglund
我们展示了近红外光通过Ag-VO2和Au-VO2双层膜的周期性亚波长孔径阵列的传输调制，利用了VO2中的半导体到金属相变。当VO2从半导体到金属相时，透射强度比增加了8倍。我们将这种调制归因于阵列中充满空气的孔与周围VO2材料之间可切换的介电介电常数对比，这一猜想通过模拟得到了半定量的证实。
We demonstrate the modulation of the transmission of near-infrared light through a periodic array of subwavelength apertures in Ag–VO2 and Au–VO2 double-layer films using the semiconductor-to-metal phase transition in VO2. The transmitted intensity ratio increases by a factor of 8 as the VO2 goes from the semiconductor to the metal phase. We attribute this modulation to the switchable dielectric-permittivity contrast between the air-filled holes in the array and the surrounding VO2 material, a conjecture that is semiquantitatively confirmed by simulation.