On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface

Dou, Linyuan; Xie, Lingyun; Wei, Zeyong; Wang, Zhanshan; Cheng, Xinbin

doi:10.3390/mi13030472

Open AccessArticle

On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface

by

Linyuan Dou

^1,†

,

Lingyun Xie

^1,2,3,*,†,

Zeyong Wei

^1,2,3,*,

Zhanshan Wang

^1,2,3 and

Xinbin Cheng

^1,2,3

¹

Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China

²

MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China

³

Shanghai Frontiers Science Research Base of Digital Optics, Tongji University, Shanghai 200092, China

^*

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Micromachines 2022, 13(3), 472; https://doi.org/10.3390/mi13030472

Submission received: 21 February 2022 / Revised: 14 March 2022 / Accepted: 16 March 2022 / Published: 19 March 2022

(This article belongs to the Special Issue Tunable Nanophotonics and Reconfigurable Metadevices)

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Abstract

Photonic integrated circuits (PICs) have garnered increasing attention because of their high efficiency in information processing. Recently, lithium niobate on insulator (LNOI) has become a new platform for PICs with excellent properties. Several tunable devices such as on-chip tunable devices that utilize the electric-optic effect of LN have been reported. However, an on-chip electrically tunable beam modulator that can focus or deflect the wave has not yet been developed. In this study, we designed an electrically tunable LNOI metasurface for on-chip optical beam manipulation. With a carefully designed local phase profile, we realized the tunable focusing and reflection functions on the chip. As the bias voltage varies, the focusing length can be shifted up to 19.9 μm (~13λ), whereas the focusing efficiency remains greater than 72%. A continuously tunable deflection can also be achieved efficiently within a range of 0–45°. The beam modulator enhances the ability to manipulate light on LNOI chips, which is expected to promote the development of integrated on-chip photonics.

Keywords: beam modulator; focus; LNOI; metasurface; on-chip; reflection; tunable

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MDPI and ACS Style

Dou, L.; Xie, L.; Wei, Z.; Wang, Z.; Cheng, X. On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface. Micromachines 2022, 13, 472. https://doi.org/10.3390/mi13030472

AMA Style

Dou L, Xie L, Wei Z, Wang Z, Cheng X. On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface. Micromachines. 2022; 13(3):472. https://doi.org/10.3390/mi13030472

Chicago/Turabian Style

Dou, Linyuan, Lingyun Xie, Zeyong Wei, Zhanshan Wang, and Xinbin Cheng. 2022. "On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface" Micromachines 13, no. 3: 472. https://doi.org/10.3390/mi13030472

APA Style

Dou, L., Xie, L., Wei, Z., Wang, Z., & Cheng, X. (2022). On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface. Micromachines, 13(3), 472. https://doi.org/10.3390/mi13030472

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On-Chip Optical Beam Manipulation with an Electrically Tunable Lithium-Niobate-on-Insulator Metasurface

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