UNIGE document Scientific Article
previous document  unige:40865  next document
add to browser collection
Title

An IR modulator based on the self-assembly of gold nanoparticles on germanium

Authors
Published in Physical Chemistry Chemical Physics. 2014, vol. 16, no. 36, p. 19402-19407
Abstract By using a polyelectrolyte layer gold nanoparticles have been assembled onto a Ge internal reflection element. Upon illumination with visible and near infrared light a strong infrared absorption has been observed, which can be traced to intervalence band transitions in Ge. This reveals the existence of holes in the Ge near its valence band edge. The switching between bright and dark states is faster than 160 μs and the device acts as an infrared modulator. The effect develops with a peculiar kinetics, which may indicate the development of an interfacial layer between germanium and gold that allows efficient electron transfer upon illumination.
Identifiers
Full text
Article (Published version) (2 MB) - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://xlink.rsc.org/?DOI=C4CP02437K
Structures
Research group Groupe Bürgi
Citation
(ISO format)
GHOSH, Harekrishna, BOUHEKKA, Ahmed, BUERGI, Thomas. An IR modulator based on the self-assembly of gold nanoparticles on germanium. In: Physical Chemistry Chemical Physics, 2014, vol. 16, n° 36, p. 19402-19407. https://archive-ouverte.unige.ch/unige:40865

226 hits

0 download

Update

Deposited on : 2014-10-13

Export document
Format :
Citation style :