Near-zero-index ultra-fast pulse characterization.
Near-zero-index ultra-fast pulse characterization.
复制标题
DOI：
10.1038/s41467-022-31151-4
复制
发表时间：
2022-06-20
影响因子：
16.6
通讯作者：
Ferrera, Marcello
中科院分区：
文献类型：
--
作者：
Jaffray, Wallace;Belli, Federico;Carnemolla, Enrico G.;Dobas, Catalina;Mackenzie, Mark;Travers, John;Kar, Ajoy K.;Clerici, Matteo;DeVault, Clayton;Shalaev, Vladimir M.;Boltasseva, Alexandra;Ferrera, Marcello
透明导电氧化物在其线性折射率接近于零的近红外窗口中表现出巨大的光学非线性。尽管这些非线性的幅度和速度，这些化合物的“杀手”光学应用尚未被发现。由于通常使用的带内跃迁的吸收性质，应考虑具有短光程的面外配置。在这个方向上，我们提出了一种替代的频率分辨光学选通方案的超快光脉冲的特性，利用近零指数的氧化铝锌薄膜。除了在可制造性和成本方面的技术优势外，我们的系统在关键指标（如操作带宽，灵敏度和鲁棒性）方面优于商业模块。性能增强还带来了同时自相位匹配二次和三次谐波产生的额外好处。由于新方法对探测超快事件的根本重要性，我们的解决方案可能对许多研究实验室和行业具有根本意义。频率分辨光门是表征超快光脉冲的核心方法。在这里，作者使用零指数非线性，大大提高了关键性能，并使同时进行二次和三次谐波测量。
Transparent conducting oxides exhibit giant optical nonlinearities in the near-infrared window where their linear index approaches zero. Despite the magnitude and speed of these nonlinearities, a “killer” optical application for these compounds has yet to be found. Because of the absorptive nature of the typically used intraband transitions, out-of-plane configurations with short optical paths should be considered. In this direction, we propose an alternative frequency-resolved optical gating scheme for the characterization of ultra-fast optical pulses that exploits near-zero-index aluminium zinc oxide thin films. Besides the technological advantages in terms of manufacturability and cost, our system outperforms commercial modules in key metrics, such as operational bandwidth, sensitivity, and robustness. The performance enhancement comes with the additional benefit of simultaneous self-phase-matched second and third harmonic generation. Because of the fundamental importance of novel methodologies to characterise ultra-fast events, our solution could be of fundamental use for numerous research labs and industries. Frequency resolved optical gating is the core method for characterising ultra-fast optical pulses. Here, the authors use zero-index nonlinearities to largely enhance key performances and enable simultaneous second and third harmonic measurements.
登录
查看更多内容
影响因子：
3.6
作者：
Iaconis, C;Walmsley, IA
通讯作者：
Walmsley, IA
影响因子：
3.8
作者：
Ikeda, Kazuhiro;Saperstein, Robert E.;Fainman, Yeshaiahu
通讯作者：
Fainman, Yeshaiahu
影响因子：
10.8
作者：
Feigenbaum, Eyal;Diest, Kenneth;Atwater, Harry A.
通讯作者：
Atwater, Harry A.
影响因子：
7
作者：
Capretti, Antonio;Wang, Yu;Dal Negro, Luca
通讯作者：
Dal Negro, Luca
影响因子：
2.7
作者：
Bruno, Vincenzo;Vezzoli, Stefano;Clerici, Matteo
通讯作者：
Clerici, Matteo