Self-organized plasmonic metasurfaces for all-optical modulation

被引：27

作者：

Della Valle, G. ^{[1
,2
]}

Polli, D. ^{[1
,2
]}

Biagioni, P. ^{[1
]}

Martella, C. ^{[3
,4
]}

Giordano, M. C. ^{[3
,4
]}

Finazzi, M. ^{[1
]}

Longhi, S. ^{[1
,2
]}

Duo, L. ^{[1
]}

Cerullo, G. ^{[1
,2
]}

de Mongeot, F. Buatier ^{[3
,4
]}

机构：

[1] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[2] CNR, Ist Foton & Nanotecnol, I-20133 Milan, Italy

[3] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[4] CNISM, I-16146 Genoa, Italy

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 23期

关键词：

ELECTRON THERMALIZATION; DYNAMICS; RELAXATION; ABSORPTION;

D O I：

10.1103/PhysRevB.91.235440

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We experimentally demonstrate a self-organized metasurface with a polarization dependent transmittance that can be dynamically controlled by optical means. The configuration consists of tightly packed plasmonic nanowires with a large dispersion of width and height produced by the defocused ion-beam sputtering of a thin gold film supported on a silica glass. Our results are quantitatively interpreted according to a theoretical model based on the thermomodulational nonlinearity of gold and a finite-element numerical analysis of the absorption and scattering cross-sections of the nanowires. We found that the polarization sensitivity of the metasurface can be strongly enhanced by pumping with ultrashort laser pulses, leading to potential applications in ultrafast all-optical modulation and switching of light.

引用

页数：10

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