Continuously apodized fiber-to-chip surface grating coupler with refractive index engineered subwavelength structure.
Opt Lett
; 35(19): 3243-5, 2010 Oct 01.
Article
en En
| MEDLINE
| ID: mdl-20890347
ABSTRACT
We demonstrate a fully etched, continuously apodized fiber-to-chip surface grating coupler for the first time (to our knowledge). The device is fabricated in a single-etch step and operates with TM-polarized light, achieving a coupling efficiency of 3.7 dB and a 3 dB bandwidth of 60 nm. A subwavelength microstructure is employed to generate an effective medium engineered to vary the strength of the grating and thereby maximize coupling efficiency, while mitigating backreflections at the same time. Minimum feature size is 100 nm for compatibility with deep-UV 193 nm lithography.
Texto completo:
1
Base de datos:
MEDLINE
Idioma:
En
Revista:
Opt Lett
Año:
2010
Tipo del documento:
Article
País de afiliación:
España