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- Title
Lithium niobate thin film electro-optic modulator.
- Authors
Liu, Jikun; Qu, Lun; Wu, Wei; Jin, Chunyan; Chen, Zhihao; Gu, Zhidong; Liu, Weiye; Wang, Chenxiong; Zheng, Dahuai; Liu, Hongde; Cai, Wei; Ren, Mengxin; Xu, Jingjun
- Abstract
The linear electro-optic effect offers a valuable means to control light properties via an external electric field. Lithium niobate (LN), with its high electro-optic coefficients and broad optical transparency ranges, stands out as a prominent material for efficient electro-optic modulators. The recent advent of lithium niobate-on-insulator (LNOI) wafers has sparked renewed interest in LN for compact photonic devices. In this study, we present an electro-optic modulator utilizing a thin LN film sandwiched between top and bottom gold (Au) film electrodes, forming a Fabry–Pérot (F–P) resonator. This resonator exhibits spectral resonance shifts under an applied electric field, enabling efficient modulation of reflected light strength. The modulator achieved a 2.3 % modulation amplitude under ±10 V alternating voltage. Our approach not only presents a simpler fabrication process but also offers larger modulation amplitudes compared to previously reported metasurface based LN electro-optic modulators. Our results open up new opportunities for compact electro-optic modulators with applications in beam steering devices, dynamic holograms, and spatial light modulators, and more.
- Subjects
THIN films; SPATIAL light modulators; ELECTROOPTICS; OPTICAL modulation; AMPLITUDE modulation; LITHIUM niobate; BEAM steering; OPTICAL modulators
- Publication
Nanophotonics (21928606), 2024, Vol 13, Issue 8, p1503
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2023-0865