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arXiv 2203.04355cond-mat.mtrl-sci
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二维混合钙钛矿的腔增强拉曼散射

Cavity-Enhanced Raman Scattering from 2D Hybrid Perovskites

Aditya Singh, Jason Lynch, Surendra B. Anantharaman, Jin Hou, Simrjit Singh, Gwangwoo Kim, Aditya D. Mohite, Rajendra Singh, Deep Jariwala

摘要:

二维(2D)杂化有机-无机钙钛矿(HOIP)由于其高效的发光特性和强的介电约束效应而在光电应用中具有很好的前景。拉曼光谱是一种通用的、非接触的、通常是非破坏性的技术,广泛用于表征晶体材料。然而,固有的弱声子散射,强背景,和复杂的性质的拉曼信号从HOIP在获得可靠的信号提出了挑战。此外,2D HOIP晶体的易碎性质导致在暴露于热、光和湿气时快速降解,这在增强拉曼散射光子信号方面存在进一步的困难。在此,我们报道了一种新的方法来增强弱拉曼散射信号的Ruddlesden-Popper(RP)相HOIP通过引入一个开放的腔包括HOIP晶体在金衬底上。我们观察到由于高折射率HOIP晶体内部的Purcell效应,拉曼信号增强了15倍。我们简单的方法可以扩展到增强其他HOIP和范德华力分层晶体中声子散射的研究。

英文摘要:

Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs) are promising candidates for optoelectronic applications due to their efficient light emission properties, and strong dielectric confinement effects. Raman spectroscopy is a versatile, non-contact and often non-destructive technique, widely used to characterize crystalline materials. However, the inherently weak phonon scattering, strong background, and complex nature of the Raman signals from HOIPs present challenges in obtaining reliable signals. Further, the fragile nature of the 2D HOIP crystals results in rapid degradation upon exposure to heat, light and moisture, which presents further difficulty in enhancing Raman scattered photon signals. Herein, we report a novel approach to enhance the weak Raman scattering signals in Ruddlesden-Popper (RP) phase HOIPs by introducing an open-cavity comprising HOIP crystals on a gold substrate. We observe 15x enhancement of the Raman signals due to the Purcell effect inside the high-index HOIP crystals. Our simple approach can be extended to enhance the study of phonon scattering in other HOIP and van der Waals layered crystals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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