Volume 98, Number 4, May 2012
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||30 May 2012|
Resonance quality, radiative/ohmic losses and modal volume of Mie plasmons
Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS - Université de Bourgogne 9 Av. A. Savary, BP 47 870, 21078 Dijon, France, EU
Accepted: 25 April 2012
Molecular sytems are efficiently coupled to metal nanoparticles via the excitation of localized surface plasmons-polaritons (SPPs). The coupling strength between SPP and emitters can be estimated from the ratio Q/V where Q and V refer to the mode quality factor and effective volume, respectively. In this letter, we investigate in details the properties of Mie plasmons supported by a metallic nanosphere (Q-factor, radiative and ohmic losses, modal volume). We particularly focus on the difficulty to unambiguously define the modal volumes of localized SPPs. This leads us to propose two definitions; the first one is based on Purcell factor for a dipolar emitter in close proximity to the metallic nanoparticle and the second one is adapted from cavity quantum electrodynamics concept (cQED). This work brings simple hand tools to characterize the main properties of localized SPPs and will be helpful in designing optical nanosources. It also makes a bridge between cQED and quantum plasmonics.
PACS: 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 42.50.Pq – Cavity quantum electrodynamics; micromasers
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.