Title
Light-Controlled Plasmon Switching Using Hybrid Metal-Semiconductor Nanostructures
Keywords
light-controlled SPP switch; Pauli blocking; photobleaching; quasi-equilibrium; Surface plasmon polaritons
Abstract
We present a proof of concept for the dynamic control over the plasmon resonance frequencies in a hybrid metal-semiconductor nanoshell structure with Ag core and TiO 2 coating. Our method relies on the temporary change of the dielectric function ε of TiO 2 achieved through temporarily generated electron-hole pairs by means of a pump laser pulse. This change in ε leads to a blue shift of the Ag surface plasmon frequency. We choose TiO 2 as the environment of the Ag core because the band gap energy of TiO 2 is larger than the Ag surface plasmon energy of our nanoparticles, which allows the surface plasmon being excited without generating electron-hole pairs in the environment at the same time. We calculate the magnitude of the plasmon resonance shift as a function of electron-hole pair density and obtain shifts up to 126 nm at wavelengths around 460 nm. Using our results, we develop the model of a light-controlled surface plasmon polariton switch. © 2012 American Chemical Society.
Publication Date
6-13-2012
Publication Title
Nano Letters
Volume
12
Issue
6
Number of Pages
2690-2696
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1021/nl203990c
Copyright Status
Unknown
Socpus ID
84862276456 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84862276456
STARS Citation
Paudel, Hari P. and Leuenberger, Michael N., "Light-Controlled Plasmon Switching Using Hybrid Metal-Semiconductor Nanostructures" (2012). Scopus Export 2010-2014. 4228.
https://stars.library.ucf.edu/scopus2010/4228