文章基本信息

标题：Near-field spectrum retrieving through non-degenerate coupling emission
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作者：Yikai Chen ; Zhonghua Shen
期刊名称：Nanophotonics
印刷版ISSN：2192-8606
电子版ISSN：2192-8614
出版年度：2020
卷号：9
期号：1
页码：235-243
DOI：10.1515/nanoph-2019-0429
出版社：Walter de Gruyter GmbH
摘要：We present a scheme to retrieve the initial spectrum of probe molecules in the near field. This is achieved by replacing conventional glass substrates with a hybrid mode photonics chip to create rich and persistent mode distributions and by observing the far-field scattering pattern. The manner of coupling from near field to far field is confirmed by the calculated dependence of the coupled emission signal on the unique material properties. By using an optimization algorithm to retrieve the intensity ratio of near-field optical signals in each frequency band gradually without the need for complicated instruments and time-consuming acquisition processes, our method can achieve broadband non-distortion spectral analysis in an enhanced optical antenna by selecting substrate parameters.
关键词：spectrum ; hybrid modes ; coupled emission ; leakage radiation microscopy