Ultrasmall metal-insulator-metal nanoresonators: impact of slow-wave effects on the quality factor
Langue
en
Article de revue
Ce document a été publié dans
Optics Express. 2012-07-11, vol. 20, n° 15, p. 16880-16891
Optical Society of America - OSA Publishing
Résumé en anglais
We study the quality factor variation of three dimensional Metal-Insulator-Metal nanoresonators when their volume is shrunk from the diffraction limit (λ /2n)3 down to a deep subwavelength scale (λ /50)3. In addition to ...Lire la suite >
We study the quality factor variation of three dimensional Metal-Insulator-Metal nanoresonators when their volume is shrunk from the diffraction limit (λ /2n)3 down to a deep subwavelength scale (λ /50)3. In addition to rigorous fully-vectorial calculations, we provide a semianalytical expression of the quality factor Q obtained with a Fabry-Perot model. The latter quantitatively predicts the absorption and radiation losses of the nanoresonator and provides an in-depth understanding of the mode lifetime that cannot be obtained with brute-force computations. In particular, it highlights the impact of slow-wave effects on the Q-factor as the size of the resonator is decreased. The Fabry-Perot model also evidences that, unexpectedly, wave retardation effects are present in metallic nanoparticles, even for deep subwavelength dimensions in the quasi-static regime.< Réduire
Mots clés en anglais
Surface plasmons
Metamaterials
Manoresonators
Origine
Importé de halUnités de recherche