OPTIMIZATION OF THE SLOW-MODE PLASMON POLARITON IN LIGHT-EMITTING TUNNEL-JUNCTIONS

MP CONNOLLY*, P DAWSON

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Light emitted from metal/oxide/metal tunnel junctions can originate from the slow-mode surface plasmon polariton supported in the oxide interface region. The effective radiative decay of this mode is constrained by competition with heavy intrinsic damping and by the need to scatter from very small scale surface roughness; the latter requirement arises from the mode's low phase velocity and the usual momentum conservation condition in the scattering process. Computational analysis of conventional devices shows that the desirable goals of decreased intrinsic damping and increased phase velocity are influenced, in order of priority, by the thickness and dielectric function of the oxide layer, the type of metal chosen for each conducting electrode, and temperature. Realizable devices supporting an optimized slow-mode plasmon polariton are suggested. Essentially these consist of thin metal electrodes separated by a dielectric layer which acts as a very thin (a few nm) electron tunneling barrier but a relatively thick (several 10's of nm) optically lossless region. (C) 1995 American Institute of Physics.

Original languageEnglish
Pages (from-to)5522-5533
Number of pages12
JournalJournal of Applied Physics
Volume78
Issue number9
Publication statusPublished - 01 Nov 1995

Keywords

  • SURFACE-PLASMON
  • ELECTROMAGNETIC MODES
  • SCHOTTKY DIODES
  • EMISSION
  • CONSTANTS
  • GRATINGS
  • ALUMINUM
  • METALS
  • FILMS
  • AG

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