Photonic Assemblies of Randomly Oriented Nanocrystals for Engineered Nonlinear and Electro-Optic Effects

被引：13

作者：

Vogler-Neuling, Viola Valentina ^{[1
]}

Karvounis, Artemios ^{[1
]}

Morandi, Andrea ^{[1
]}

Weigand, Helena ^{[1
]}

Denervaud, Eric ^{[1
]}

Grange, Rachel ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Inst Quantum Elect, Dept Phys, Opt Nanomat Grp, CH-8093 Zurich, Switzerland

来源：

ACS PHOTONICS | 2022年 / 9卷 / 07期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”; 欧洲研究理事会;

关键词：

nanoparticles; barium titanate; lithium niobate; second harmonic generation; bottom-up; assemblies; LITHIUM-NIOBATE; WAVE-GUIDES; BATIO3; NANOPARTICLES; LOCALIZATION; MODULATION; SILICON;

D O I：

10.1021/acsphotonics.2c00081

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nonlinear crystals that have a noncentrosymmetric crystalline structure, such as lithium niobate (LiNbO3) and barium titanate (BaTiO3) exhibit nonzero second-order tensor susceptibilities (chi(2)) and linear electro-optic coefficients (rij). The constraints associated with top-down nanofabrication methods have led to bottom up approaches to harness the strong nonlinearities and electro-optical properties. Here, we present an overview of photonic assemblies made of randomly oriented noncentrosymmetric nanocrystals via bottom-up fabrication methods. In this configuration, nanocrystals can form objects with tunable dimensions, increased complexity, and a great span of symmetry level, ranging from thin layers to spheres. At the same time, according to their shape, photonic assemblies may support optical modes, that is, Mie or guided, which can tailor linear optical properties and enhance nonlinear and electro-optic responses. As a result, assemblies of noncentrosymmetric nanocrystals can form a disruptive platform to realize photonic integrated devices free of etching process and over large surface areas. Last, we foresee potential applications of noncentrosymmetric nanocrystals in various fields of nano-optics and sensing.

引用

页码：2193 / 2203

页数：11