Plasmonic cavities and optical nanosources

• Main Author: Derom, Stéphane
• Language: English
• Published: Université de Bourgogne 2013
• Subjects: [PHYS:COND:CM_GEN] Physics/Condensed Matter/Other; [PHYS:COND:CM_GEN] Physique/Matière Condensée/Autre; [SPI:OTHER] Engineering Sciences/Other; [SPI:OTHER] Sciences de l'ingénieur/Autre; Plasmonic cavity; Localized surface plasmon; Spontaneous emission; Time-resolved spectroscopy
• Online Access: http://tel.archives-ouvertes.fr/tel-01005260; http://tel.archives-ouvertes.fr/docs/01/00/52/60/PDF/these_A_DEROM_Stephane_2013.pdf

Optical microcavities exhibit high resonance quality, so that, they are of key interest for the design of low-threshold lasers or for achieving strong coupling regime. But, such systems support modes whose the volume remain diffraction limited.In this manuscript, we are interested in their plasmonic counterparts because they support confined modes at the sub-wavelength scale. First, we study an in-plane plasmonic cavity which is the transposition of 1D optical cavity to surface wave. We characterize the cavity by measuring the fluorescence lifetime of dye molecules deposited inside.Then, we are interested in 3-dimension mode confinement achieved by spherical metal nanoparticles. We discuss on the definition of the mode volume used in cavity quantum electrodynamic and based on the calculation of energy confinement around the particle. We also simulate the fluorescence enhancement of rare-earth ions embedded inside core-shell plasmonic particles. Finally, we disturb the photodynamic emission of a single-photon source by puttingthe extremity of a plasmonic tip nearby the emitter