First-order perturbation theory for changes in the surrounding of open optical resonators.
Opt Lett
; 44(24): 5917-5920, 2019 Dec 15.
Article
en En
| MEDLINE
| ID: mdl-32628185
ABSTRACT
The single-mode approximation of resonant state expansion has proven to give accurate first-order approximations of resonance shifts and linewidth changes when modifying the material properties inside open optical resonators. Here, we extend this first-order perturbation theory to modifications of the material properties in the surrounding medium. As a side product of our derivations, we retrieve the already known analytical normalization condition for resonant states. We apply our theory to two example systems a metallic nanosphere and a periodic array of metallic nanoslits.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Opt Lett
Año:
2019
Tipo del documento:
Article