| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5442697 | Optical Materials | 2017 | 5 Pages |
Abstract
A high-extinction-ratio bandgap of air-bridge photonic crystal slab, in the near infrared, is reported. These structures were patterned in single-crystalline LiNbO3 film bonded to SiO2/LiNbO3 substrate by focused ion beam. To improve the vertical confinement of light, the SiO2 layer was removed by 3.6% HF acid. Compared with photonic crystals sandwiched between SiO2 and air, the structures suspending in air own a robust photonic bandgap and high transmission efficiency at valence band region. The measured results are in good agreement with numerically computed transmission spectra by finite-difference time-domain method. The air-bridge photonic crystal waveguides were formed by removing one line holes. We reveal experimentally the guiding characteristics and calculate the theoretical results for photonic crystal waveguides in LiNbO3 film.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Shao-Mei Zhang, Lu-Tong Cai, Yun-Peng Jiang, Yang Jiao,