Excitation-Transfer Plasmonic Nanosensors based on Dynamical Phase Transitions
arXiv:1210.0711 · doi:10.1021/jp302176n
Abstract
Dynamical Phase transitions (DPTs) describe the abrupt change in the dynamical properties of open systems when a single control parameter is slightly modified. Recently we found that this phenomenon is also present in a simple model of a linear array of metallic nanoparticles (NPs) in the form of a localized-delocalized DPT. In this work we show how to take advantage of DPTs in order to design a new kind of plasmonic sensor which should own some unique characteristics. For example, if it were used as plasmon ruler it would not follow the so called universal plasmon ruler equation [Nano Letters 2007, 7, 2080-2088], exhibiting instead an on-off switching feature. This basically means that a signal should only be observed when the control/measured parameter, i.e. a distance in the case of plasmon rulers, has a very precise and pre-determined value. Here, we demonstrate their feasibility and unique characteristics, showing that they combine high sensitivity with this on-off switching feature in terms of different distances and local dielectric constants. This property has the potentiality to be used in the design of new plasmonic devices such as plasmonic circuits activated only under certain environmental conditions.
References in corpus (5)
- Theory of Linear Chains of Metamaterial/Plasmonic Particles as Sub-Diffraction Optical Nanotransmission Lines
- Propagation of Surface Plasmons in Ordered and Disordered Chains of Metal Nanospheres
- Dynamical regimes of a quantum swap gate beyond the Fermi Golden Rule
- Interactions of nanorod particles in the strong coupling regime
- Light Propagation in Linear Arrays of Spherical Particles