Ultralow-energy and high-contrast all-optical switch involving Fano resonance based on coupled photonic crystal nanocavities.
Opt Express
; 21(10): 11877-88, 2013 May 20.
Article
em En
| MEDLINE
| ID: mdl-23736410
ABSTRACT
We experimentally and theoretically clarified that a Fano resonant system based on a coupled optical cavity has better performance when used as an all-optical switch than a single cavity in terms of switching energy, contrast, and operation bandwidth. We successfully fabricated a Fano system consisting of doubly coupled photonic-crystal (PhC) nanocavities, and demonstrated all-optical switching for the first time. A steep asymmetric transmission spectrum was clearly observed, thereby enabling a low-energy and high-contrast switching operation. We achieved the switching with a pump energy of a few fJ, a contrast of more than 10 dB, and an 18 ps switching time window. These levels of performance are actually better than those for Lorentzian resonance in a single cavity. We also theoretically investigated the achievable performance in a well-designed Fano system, which suggested a high contrast for the switching of more than 20 dB in a fJ energy regime.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Processamento de Sinais Assistido por Computador
/
Ressonância de Plasmônio de Superfície
/
Nanotecnologia
/
Modelos Teóricos
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article