TY - JOUR
T1 - Gain-driven singular resonances in active core-shell and nano-shell plasmonic particles
AU - Caicedo, Karen
AU - Cathey, Andres
AU - Infusino, Melissa
AU - Aradian, Ashod
AU - Veltri, Alessandro
N1 - Publisher Copyright:
© 2021 Optical Society of America.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - Within the frame of a simple, long-wavelength, quasi-static description, we present a theoretical characterization of the optical response of metal nanoparticles doped with active gain elements in a core-shell (metallic core within an active dielectric shell) and nano-shell (active dielectric core within a metallic shell) configurations. The common feature of these structures is that, adding gain to the system produces an increase of the quality of the plasmon resonance, which becomes sharper and sharper until a singular point, after which, the system switches from absorptive to emissive (nanolaser). We use this aforementioned simple model to develop a general method allowing us to calculate both the expected singular plasmon frequency and the gain level needed to realize it and to discuss the spectral deformation occurring before and after this singular point. Finally, we propose a way to calculate if the singular behavior is reachable using realistic amounts of gain.
AB - Within the frame of a simple, long-wavelength, quasi-static description, we present a theoretical characterization of the optical response of metal nanoparticles doped with active gain elements in a core-shell (metallic core within an active dielectric shell) and nano-shell (active dielectric core within a metallic shell) configurations. The common feature of these structures is that, adding gain to the system produces an increase of the quality of the plasmon resonance, which becomes sharper and sharper until a singular point, after which, the system switches from absorptive to emissive (nanolaser). We use this aforementioned simple model to develop a general method allowing us to calculate both the expected singular plasmon frequency and the gain level needed to realize it and to discuss the spectral deformation occurring before and after this singular point. Finally, we propose a way to calculate if the singular behavior is reachable using realistic amounts of gain.
UR - http://www.scopus.com/inward/record.url?scp=85122560944&partnerID=8YFLogxK
U2 - 10.1364/JOSAB.441637
DO - 10.1364/JOSAB.441637
M3 - Artículo
AN - SCOPUS:85122560944
SN - 0740-3224
VL - 39
SP - 107
EP - 116
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 1
ER -