Integrated photonic crystal beam splitters based on thin film lithium niobate
We propose and demonstrate integrated photonic crystal (PhC) beam splitters based on X-cut thin film lithium niobate (TFLN). Its working principle is based on bandgap guidance and total reflection in the PhC slab. We designed two structures: one features a triangular lattice, while the other exhibits a tetragonal lattice. These structures have compact footprint, with size of 14.857×4.982 and 15.275×5.295 µm<sup>2</sup> for triangular and tetragonal lattices, respectively. We fabricate these devices by directly etching the TFLN. The measured insertion losses are 3.482 (triangular lattice) and 2.181 (tetragonal lattice) dB. Our proposed PhC beam splitter provides a novel approach for the realization of compact photonic devices on TFLN.
Authors
- Yu Wu (ORCID: https://orcid.org/0000-0002-6631-9618)
- Wenqu Su
- Hua Yu (ORCID: https://orcid.org/0000-0003-3120-974X)
- Jindong Lu
- Siyuan Zhou (ORCID: https://orcid.org/0009-0007-0387-225X)
- Yushan Liu (ORCID: https://orcid.org/0000-0003-3529-6748)
- Guanyu Chen (ORCID: https://orcid.org/0000-0001-7388-7149)
- Ziyao Zhang (ORCID: https://orcid.org/0009-0004-0354-8087)
Publication Details
- Journal
- Optics Express
- Published
- 2024-12-18
- DOI
- https://doi.org/10.1364/oe.541824
- Citations
- 3
- Primary Topic
- Photorefractive and Nonlinear Optics
- Type
- article
- Field-Weighted Citation Impact
- 1.01
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities