Compact mode converter on SOI based on a polygonal subwavelength grating structure.
Opt Lett
; 49(4): 834-837, 2024 Feb 15.
Article
in En
| MEDLINE
| ID: mdl-38359194
ABSTRACT
In this Letter, we design and experimentally demonstrate compact mode converters with a lightning-like and arrow-like polygonal subwavelength grating (SWG) structure on a silicon-on-insulator (SOI) platform, which can convert the TE0 mode to the TE1 and TE2 modes, respectively. The footprints of the proposed TE0-1 and TE0-2 mode converters are only 4.44 × 1.3 and 5.89 × 1.8â
µm2, respectively. The experimental results show the mode converters have a low insertion loss (<1â
dB) and a broad bandwidth (>50â
nm). The measured cross talks of the TE0-1 and TE0-2 mode converters are -7.2â
dB and -10.3â
dB, respectively. In addition, the proposed mode converters with the SWG structure have the advantage in fabrication, since only a one-step full-etching process is required.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Opt Lett
Year:
2024
Document type:
Article