arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1306.5360cond-mat.mtrl-sci
收藏

外延银的本征光学性质和增强等离子体响应

Intrinsic Optical Properties and Enhanced Plasmonic Response of Epitaxial Silver

Yanwen Wu, Chengdong Zhang, Yang Zhao, Jisun Kim, Matt Zhang, Xing-Xiang Liu, Greg K. Pribi, Andrea Alù, Chih-Kang Shih, Xiaoqin Li

摘要:

等离子体提供了一个诱人的平台,以操纵光在亚波长尺度。目前,损失是阻碍其进展和对实用技术产生广泛影响的最严重挑战。在这方面,银(Ag)是光学频率下的优选等离子体材料,在该频率范围内的所有金属中具有最低的损耗。然而,由于样品制备过程的变化,产生不可控的晶界和与额外损失相关的缺陷,在广泛引用的Ag光损耗值之间存在很大的差异。一个自然的问题出现了:什么是银的内在基本光学性质和它的最终可能性在等离子体激元领域?使用原子级光滑的外延Ag膜,我们提取了新的光学常数,反映了显着降低的损耗和测量大大增强的传播距离的表面等离子体激元(SPPs)超出了以前认为可能的。通过建立银的最终光学性质的新基准,这些结果将对超材料和等离子体应用产生广泛的影响。

英文摘要:

Plasmonics offers an enticing platform to manipulate light at the subwavelength scale. Currently, loss represents the most serious challenge impeding its progress and broad impact towards practical technology. In this regard, silver (Ag) is by far the preferred plasmonic material at optical frequencies, having the lowest loss among all metals in this frequency range. However, large discrepancies exist among widely quoted values of optical loss in Ag due to variations in sample preparation procedures that produce uncontrollable grain boundaries and defects associated with additional loss. A natural question arises: what are the intrinsic fundamental optical properties of Ag and its ultimate possibilities in the field of plasmonics? Using atomically-smooth epitaxial Ag films, we extracted new optical constants that reflect significantly reduced loss and measured greatly enhanced propagation distance of surface plasmon polaritons (SPPs) beyond what was previously considered possible. By establishing a new benchmark in the ultimate optical properties of Ag, these results will have a broad impact for metamaterials and plasmonic applications.

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。

↑