Strong optical absorption of a metallic film to induce a lensing effect in the visible region

An Qing Jiang, Kai Yan Zang, Er Tao Hu, Hua Tian Tu, Lei Xu, Wen Shuai Ren, Osamu Yoshie, Young Pak Lee, Yu Xiang Zheng, Song You Wang, Hai Bin Zhao, Jun Peng Guo, C. Z. Wang, K. M. Ho, David W. Lynch, Liang Yao Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this work, the two-dimensional profile of the light transmission through a prism-like metallic film sample of Au was measured at a wavelength of 632.8 nm in the visible intraband transition region to verify that, beyond the possible mechanisms of overcoming the diffraction limit, a strongly nonuniform optical absorption path length of the light traveling in the metal could induce a lensing effect, thereby narrowing the image of an object. A set of prism-like Au samples with different angles was prepared and experimentally investigated. Due to the nonuniform paths of the light traveling in the Au samples, lens-effect-like phenomena were clearly observed that reduced the imaged size of the beam spot with decreasing light intensity. The experimental measurements presented in the work may provide new insight to better understand the light propagation behavior at a metal/dielectric interface.

Original languageEnglish
Article number12434
JournalScientific reports
Issue number1
Publication statusPublished - 2019 Dec 1

ASJC Scopus subject areas

  • General


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