Far-field control of focusing plasmonic waves through disordered nanoholes

Eunsung Seo, Joonmo Ahn, Wonjun Choi, Hakjoon Lee, Young Min Jhon, Sang Hoon Lee, Wonshik Choi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Control of near-field waves is the key to going beyond the diffraction limit in imaging and manipulating target objects. Here we present the focusing of plasmonic waves, a type of near-field waves, by the wavefront shaping of far-field waves. We coupled far-field waves to a random array of holes on a thin gold film to generate speckled plasmonic waves. By controlling the phase pattern of the incident waves with the wavelength of 637 nm, we demonstrated the focusing of plasmonic waves down to 170 nm at arbitrary positions. Our study shows the possibility of using disordered nanoholes as a plasmonic lens with high flexibility in the far-field control.

Original languageEnglish
Pages (from-to)5838-5841
Number of pages4
JournalOptics Letters
Volume39
Issue number20
DOIs
Publication statusPublished - 2014 Jan 1

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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