Electrically generated optical waveguide in a lithium-niobate thin film

Qingming Chen, Yujiao Zhu, Di Wu, Tenghao Li, Zhaohui Li, Chao Lu, Kin Seng Chiang, Xuming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


This paper reports an electrically generated optical waveguide for the transversemagnetic wave. The waveguide is formed in a z-cut single-crystal lithium-niobate (LN) thin film by the electro-optic effect, where the extraordinary refractive index (RI) of the LN film is increased by a voltage applied to patterned electrodes that define the waveguide geometry. Such a waveguide can be made to exist or disappear by turning on or off the applied voltage. A straight waveguide and an S-bend waveguide with an RI contrast of ~0.004 are generated at a voltage of 200V. The propagation loss of the generated waveguide measured at the wavelength 532 nm is 1.8 dB/cm. Electrically generated optical waveguides could fulfill useful functions in photonic integrated circuits, such as reconfigurable cross connect and switching that require wavelength-independent and mode-independent operation.

Original languageEnglish
Pages (from-to)29895-29903
Number of pages9
JournalOptics Express
Issue number20
Publication statusPublished - 28 Sept 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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