Carletti L, Locatelli A, Stepanenko O, Leo G, De Angelis C
Opt Express. 2015 Oct 5;23(20):26544-50. doi: 10.1364/OE.23.026544.
We designed AlGaAs-on-aluminium-oxide all-dielectric nanoantennas with magnetic dipole resonance at near-infrared wavelengths. These devices, shaped as cylinders of 400nm height and different radii, offer a few crucial advantages with respect to the silicon-on-insulator platform for operation around 1.55μm wavelength: absence of two-photon absorption, high χ((2)) nonlinearity, and the perspective of a monolithic integration with a laser. We analyzed volume χ((2)) nonlinear effects associated to a magnetic dipole resonance in these nanoantennas, and we predict second-harmonic generation exceeding 10(-3) efficiency with 1GW/cm(2) of pump intensity.
我们设计了在近红外波长具有磁偶极子共振的氧化铝上的铝镓砷全介质纳米天线。这些器件呈高度为400nm且半径不同的圆柱体形状，相对于用于1.55μm波长附近操作的绝缘体上硅平台具有一些关键优势：不存在双光子吸收、具有高χ((2))非线性以及与激光器单片集成的前景。我们分析了这些纳米天线中与磁偶极子共振相关的体χ((2))非线性效应，并预测在泵浦强度为1GW/cm(2)时二次谐波产生效率超过10(-3)。
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