Energy transfer from Si nanocrystals to Er ions near a metal layer

✍ Scribed by Fujii, M. ;Nakamura, T. ;Miura, S. ;Inui, M. ;Hayashi, S.

• Book ID: 105364674
• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 204 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200776717

✦ Synopsis

Abstract

Er ions can be excited efficiently by energy transfer from Si nanocrystals. There are several different kinds of energy transfer processes depending on the distance between Si nanocrystals and Er ions. Among them, Förster‐type dipole–dipole interaction is considered to have the longest interaction distance. In this work, we study how the long‐distance interaction is modified when Er–Si‐nanocrystals coupled system is placed near a metal layer. We show that the energy transfer rate is strongly modified by the metal layer and the rate oscillates depending on the distance between the metal and the coupled system. From the quantitative analysis of the oscillation behavior, the energy transfer efficiency as well as the rate is estimated as a function of the energy transfer wavelength, and the evidence of resonant energy transfer is demonstrated. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)