Tuning Optical Absorption in an Ultrathin Lossy Film by Use of a Metallic Metamaterial Mirror

Junghyun Park, Ju Hyung Kang, Soo Jin Kim, Erez Hasman, Mark L. Brongersma

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present a way to tune the spectral light absorption properties of an ultrathin planar superabsorbing semiconductor film placed on a metallic metamaterial mirror. It is shown that we can change the wavelength of maximum absorption in a lossy film with a fixed thickness by tailoring the filling ratio of the metallic metamaterial. This remarkable ability of tuning originates from the control of the reflection phase pickup of light impinging from the lossy film upon the metallic metamaterial mirror. Full-field electromagnetic simulations show good agreement with the theoretical predictions. The proposed approach allows for a convenient and highly controllable way to achieve spatially variant tuning of absorption in a semiconductor film.

Original languageEnglish
Article number7106479
Pages (from-to)1617-1620
Number of pages4
JournalIEEE Photonics Technology Letters
Volume27
Issue number15
DOIs
Publication statusPublished - 2015 Aug 1
Externally publishedYes

Keywords

  • Electromagnetic wave absorption
  • Metallic metamaterial
  • Optical reflection
  • Optical tuning

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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