Optical Response of Strongly Coupled Quantum Dot−Metal Nanoparticle Systems: Double Peaked Fano Structure and Bistability
- 18 June 2008
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 8 (7), 2106-2111
- https://doi.org/10.1021/nl800921z
Abstract
In this communication, we study the optical response of a semiconductor quantum dot (SOD) coupled with a metal nanoparticle (MNP). in particular, we explore the relationship between the size of the constituents and the response of the system. We identify, here, three distinct regimes of behavior in the strong field limit that each exhibit novel properties. In the first regime, we find that the energy absorption spectrum displays an asymmetrical Fano shape (as previously predicted). It occurs when there is interference between the applied field and the induced field produced by the SOD at the MNP. When the coupling is increased by increasing the size of the SOD, we find a double peaked Fano structure in the response. This second peak occurs when the induced field becomes stronger than the external field. As the coupling is further increased by increasing the sizes of both the SOD and the MNP, we find a regime of bistability. This originates when the self-interaction of the SOD becomes significant. We explore these three regimes in detail and set bounds on each.This publication has 12 references indexed in Scilit:
- Generation of single optical plasmons in metallic nanowires coupled to quantum dotsNature, 2007
- Exciton-Plasmon-Photon Conversion in Plasmonic NanostructuresPhysical Review Letters, 2007
- On the Quenching of Semiconductor Quantum Dot Photoluminescence by Proximal Gold NanoparticlesNano Letters, 2007
- Coherent exciton-plasmon interaction in the hybrid semiconductor quantum dot and metal nanoparticle complexOptics Letters, 2007
- Polarization-Selective Plasmon-Enhanced Silicon Quantum-Dot LuminescenceNano Letters, 2006
- Semiconductor-Metal Nanoparticle Molecules: Hybrid Excitons and the Nonlinear Fano EffectPhysical Review Letters, 2006
- Exciton−Plasmon Interaction and Hybrid Excitons in Semiconductor−Metal Nanoparticle AssembliesNano Letters, 2006
- Spatially selective loading of an optical lattice by light-shift engineering using an auxiliary laser fieldNew Journal of Physics, 2006
- Energy-Time Entanglement Preservation in Plasmon-Assisted Light TransmissionPhysical Review Letters, 2005
- Plasmon-assisted transmission of entangled photonsNature, 2002