Compact nonvolatile polarization switch using an asymmetric Sb2Se3-loaded silicon waveguide.
Opt Express
; 31(6): 10684-10693, 2023 Mar 13.
Article
en En
| MEDLINE
| ID: mdl-37157610
ABSTRACT
We propose and simulate a compact (â¼29.5â
µm-long) nonvolatile polarization switch based on an asymmetric Sb2Se3-clad silicon photonic waveguide. The polarization state is switched between TM0 and TE0 mode by modifying the phase of nonvolatile Sb2Se3 between amorphous and crystalline. When the Sb2Se3 is amorphous, two-mode interference happens in the polarization-rotation section resulting in efficient TE0-TM0 conversion. On the other hand, when the material is in the crystalline state, there is little polarization conversion because the interference between the two hybridized modes is significantly suppressed, and both TE0 and TM0 modes go through the device without any change. The designed polarization switch has a high polarization extinction ratio of > 20â
dB and an ultra-low excess loss of < 0.22â
dB in the wavelength range of 1520-1585â
nm for both TE0 and TM0 modes.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2023
Tipo del documento:
Article