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Strong electro-optic effect in Mg incorporated ZnO thin films

2022-11-09

 

Author(s): Yuan, X (Yuan, X.); Yamada, T (Yamada, T.); Meng, L (Meng, L.)

Source: APPLIED PHYSICS LETTERS Volume: 121 Issue: 15 Article Number: 152903 DOI: 10.1063/5.0103831 Published: OCT 10 2022

Abstract: a-axis oriented ZnMgO epitaxial thin films with a strong linear electro-optic (EO) effect were developed by radio frequency magnetron sputtering. The Mg incorporation into ZnO thin films not only obviously increases the transmittance at the wavelength range of 400-800 nm but also reduces the leakage current by 3-6 orders of magnitude. Furthermore, with the increase in the Mg content, the linear EO response enhances significantly. In particular, the derived effective EO coefficient r(c) of the Zn0.72Mg0.28O thin film is (7.6 & PLUSMN; 0.2) pm/V, which is over three times larger than the reported values for ZnO-based thin films and over twice larger than that of ZnO single crystals. The results and discussion conclude that an enhanced intrinsic contribution can be responsible for the increase in r(c) with Mg incorporation. These findings open the way for the ZnO-based thin films to EO devices in optical communication and optical interconnects. Published under an exclusive license by Laser Institute of America.

Accession Number: WOS:000869708400001

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Meng, Lei                  0000-0001-9794-0629

Yamada, Tomoaki         I-6538-2014         0000-0001-5790-9029

ISSN: 0003-6951

eISSN: 1077-3118

Full Text: https://aip.scitation.org/doi/10.1063/5.0103831



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