Resonant Enhancement of Second-Harmonic Generation in the Mid-Infrared Using Localized Surface Phonon Polaritons in Subdiffractional Nanostructures

被引：59

作者：

Razdolski, Ilya ^{[1
]}

Chen, Yiguo ^{[2
,3
]}

Giles, Alexander J. ^{[4
]}

Gewinner, Sandy ^{[1
]}

Schoellkopf, Wieland ^{[1
]}

Hong, Minghui ^{[3
]}

Wolf, Martin ^{[1
]}

Giannini, Vincenzo ^{[2
]}

Caldwell, Joshua D. ^{[4
]}

Maier, Stefan A. ^{[2
]}

Paarmann, Alexander ^{[1
]}

机构：

[1] Fritz Haber Inst MPG, Phys Chem, Faradayweg 4-6, D-14195 Berlin, Germany

[2] Imperial Coll London, Blackett Lab, London SW7 2AZ, England

[3] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore

[4] US Naval Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA

来源：

NANO LETTERS | 2016年 / 16卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

Nonlinear optics; nanophononics; surface phonon polaritons; polar dielectrics; second harmonic generation; NATURAL HYPERBOLIC MATERIAL; HEXAGONAL BORON-NITRIDE; SCIENCE-AND-TECHNOLOGY; INFRARED REFLECTIVITY; SUBWAVELENGTH OPTICS; SIC POLYTYPES; LIGHT; PLASMONICS; EMISSION; MATTER;

D O I：

10.1021/acs.nanolett.6b03014

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the strong enhancement of mid-infrared second-harmonic generation (SHG) from SiC nanopillars due to the resonant excitation of localized surface phonon polaritons within the Reststrahlen band. A strong dependence of the SHG enhancement upon the optical mode distribution was observed. One such mode, the monopole, exhibits an enhancement that is beyond what is anticipated from field localization and dispersion of the linear and nonlinear SiC optical properties. Comparing the results for the identical nanostructures made of 4H and 6H SiC polytypes, we demonstrate the interplay of localized surface phonon polaritons with zone-folded weak phonon modes of the anisotropic crystal. Tuning the monopole mode in and out of the region where the zone-folded phonon is excited in 6H-SiC, we observe a further prominent increase of the already enhanced SHG output when the two modes are coupled. Envisioning this interplay as one of the showcase features of mid-infrared nonlinear nanophononics, we discuss its prospects for the effective engineering of nonlinear-optical materials with desired properties in the infrared spectral range.

引用

页码：6954 / 6959

页数：6

共 42 条

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