Silicon metasurfaces with tunable electromagnetic resonances for nonlinear optical conversion

被引：0

作者：

Fagiani, L. ^{[1
,2
]}

Zilli, A. ^{[1
]}

Tognazzi, A. ^{[3
,4
]}

Mafakheri, E. ^{[2
]}

Okhlopkov, K. ^{[5
]}

Rocco, D. ^{[3
,4
]}

Shcherbakov, M. ^{[5
]}

Fedyanin, A. ^{[5
]}

De Angelis, C. ^{[3
,4
]}

Finazzi, M. ^{[1
]}

Celebrano, M. ^{[1
]}

Bollani, M. ^{[2
]}

机构：

[1] Politecn Milan, Dept Phys, Piazza L Da Vinci 32, I-20133 Milan, Italy

[2] CNR IFN, LNESS Lab, Via Anzani 42, I-22100 Como, Italy

[3] Univ Brescia, Dept Informat Engn, Via Branze 38, Brescia, Italy

[4] CNR INO, Via Branze 45, I-25123 Brescia, Italy

[5] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

来源：

NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS | 2021年 / 44卷 / 4-5期

关键词：

D O I：

10.1393/ncc/i2021-21111-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dielectric metasurfaces sustain electromagnetic modes which can be exploited to enhance nonlinear frequency-conversion processes such as third-harmonic generation. In this work we employ electron-beam lithography to fabricate silicon metasurfaces supporting electromagnetic resonances with different quality factors (Q), ruled by the geometry. This allows to investigate the trade-off between resonant enhancement and matching the spectral bandwidth of the ultrafast excitation source. Both experiments and simulations indicate that higher values of Q do not a priori bring about a stronger third-harmonic generation, which correlates to the spectral overlap between the metasurface resonance and the pump bandwidth.

引用

页数：4

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