Nonlinear frequency conversion in optical nanoantennas and metasurfaces: materials evolution and fabrication

Nonlinear frequency conversion is one of the most fundamental processes in nonlinear optics. It has a wide range of applications in our daily lives, including novel light sources, sensing, and information processing. It is usually assumed that nonlinear frequency conversion requires large crystals that gradually accumulate a strong effect. However, the large size of nonlinear crystals is not compatible with the miniaturisation of modern photonic and optoelectronic systems. Therefore, shrinking the nonlinear structures down to the nanoscale, while keeping favourable conversion efficiencies, is of great importance for future photonics applications. In the last decade, researchers have studied the strategies for enhancing the nonlinear efficiencies at the nanoscale, e.g. by employing different nonlinear materials, resonant couplings and hybridization techniques. In this paper, we provide a compact review of the nanomaterials-based efforts, ranging from metal to dielectric and semiconductor nanostructures, including their relevant nanofabrication techniques.

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关键词：

nonlinear nanophotonics; metallic nanoantennas; dielectric nanoantennas; Ⅲ-Ⅴ semiconductor nanoantenna; nanofabrication

基金项目：

the Australian Research Council (ARC) and participation in the Erasmus Mundus NANOPHI project, contract number 2013 5659/002-001; ARC Discovery Early Career Research Fellowship (DE170100250); the Australian Nanotechnology Network; UNSW Scientia Fellowship; SEAM Labex (PANAMA project); the EPSRC Reactive Plasmonics Programme (EP/M013812/1); the ONR Global, the Leverhulme Trust, the Royal Society (UF150542); the Royal Society and the Wolfson Foundation; the German Research Foundation (STA 1426/2-1) and the Thuringian State Government ProExcellence initiative (APC2020)

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引用本文： Rahmani M, Leo G, Brener I, Zayats A V, Maier S Aet al. Nonlinear frequency conversion in optical nanoantennas and metasurfaces: materials evolution and fabrication. Opto-Electron Adv 1, 180021 (2018).

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