| Full text | |
| Author(s): |
Picin, Odair J.
;
Gomez, F. Reyes
;
Reyes-Gomez, E.
;
Oliveira Jr, Osvaldo N.
;
Mejia-Salazar, J. R.
;
Yin, S
;
Guo, R
Total Authors: 7
|
| Document type: | Journal article |
| Source: | PHOTONIC FIBER AND CRYSTAL DEVICES: ADVANCES IN MATERIALS AND INNOVATIONS IN DEVICE APPLICATIONS XIV; v. 11498, p. 7-pg., 2020-01-01. |
| Abstract | |
We report on the design of an all-dielectric quasiperiodic grating coupler with rectangular Si ribs on a SiO2 substrate. The structure consists of ten periods built by alternating Si ribs and air according to the S-4 step of the Fibonacci series, i.e., the period was made as ABAAB, where A (B) can be used as Si (air) or air (Si). The thicknesses of air and Si ribs were taken as 315 nm, with a total length for the unit cell of 1575 nm. The finite-difference time-domain (FDTD) technique was used to obtain the numerical data within the commercial software Lumerical FDTD. Multiple coupling efficiency peaks were observed owing to self-similarity effects. Furthermore, we show numerically that optimum wavelengths and coupling efficiency amplitudes can be tailored by varying the ribs' etch-depth and the angle of incidence from the optical fiber, which makes the proposal relevant for efficient, broadband optoelectronic circuits. (AU) | |
| FAPESP's process: | 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis |
| Grantee: | Osvaldo Novais de Oliveira Junior |
| Support Opportunities: | Research Projects - Thematic Grants |