Tunable subwavelength focusing with dispersion-engineered metamaterials in the terahertz regime

Jinho Lee, Kwangchil Lee, Haesung Park, Gumin Kang, Dai Hyuk Yu, Kyoungsik Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We develop a terahertz lens with both subwavelength resolution and tunable far-field focal length by extending the surface plasmon (SP) diffraction theory into spoof SPs of slit-groove-structure terahertz metamaterials. The dispersion properties of terahertz groove structures are engineered in the curved depth profile to produce a directional beaming feature and mimic SPs at the same time. The finite-difference time-domain simulation results confirm that the far-field focal position can be tuned by controlling the curvature of the relative electric field phase distribution profile on the output surface.

Original languageEnglish
Pages (from-to)2254-2256
Number of pages3
JournalOptics Letters
Volume35
Issue number13
DOIs
Publication statusPublished - 2010 Jul 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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