论文标题
定制依赖厚度依赖性的光学特性
Tailoring the Thickness-Dependent Optical Properties of Conducting Nitrides and Oxides for Epsilon-Near-Zero-Enhanced Photonic Applications
论文作者
论文摘要
新兴光子材料的独特性能 - 导电和氧化物 - 尤其是其可卸载性,较大的损坏阈值以及所谓的Epsilon-Near-Zero(ENZ)行为,使新的光子现象跨越了光子现象,可跨越光学电路,可调式跨面和非线性光学设备。这项工作通过调整膜厚度及其对ENZ增强光子应用的潜力来探索对多晶钛(TIN)和铝掺杂氧化锌(AZO)的光学特性的直接控制。我们证明,锡 - 阿佐·比莱斯(Tin-Azo Bilayers)充当Ferrell-Berreman metasurfaces,具有可厚度尾部的Epsilon-near-Zero共振,在在1470年至1750 nm的电信波长中运行的AZO膜中。双层堆栈在紫外线方面也充当了强光吸收器,采用了辐射ENZ模式和成分锡膜中的Fabry-Perot模式。研究的贝尔曼元面积显示了与皮秒响应时间的光学诱导的15%的反射率调制。通过使用可调的ENZ制度附近的田间增强剂的光学响应可调节性,可以实现广泛的非线性光学现象,包括全光切换,时间折射和高谐波产生。
The unique properties of the emerging photonic materials - conducting nitrides and oxides - especially their tailorability, large damage thresholds, and the so-called epsilon-near-zero (ENZ) behavior, have enabled novel photonic phenomena spanning optical circuitry, tunable metasurfaces, and nonlinear optical devices. This work explores direct control of the optical properties of polycrystalline titanium nitride (TiN) and aluminum-doped zinc oxide (AZO) by tailoring the film thickness, and their potential for ENZ-enhanced photonic applications. We demonstrate that TiN-AZO bilayers act as Ferrell-Berreman metasurfaces with thickness-tailorable epsilon-near-zero resonances in the AZO films operating in the telecom wavelengths spanning from 1470 to 1750 nm. The bilayer stacks also act as strong light absorbers in the ultraviolet regime employing the radiative ENZ modes and the Fabry-Perot modes in the constituent TiN films. The studied Berreman metasurfaces exhibit optically-induced reflectance modulation of 15% with picosecond response-time. Together with the optical response tailorability of conducting oxides and nitrides, utilizing the field-enhancement near the tunable ENZ regime could enable a wide range of nonlinear optical phenomena, including all-optical switching, time refraction, and high-harmonic generation.