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Photonic integration based on a ferroelectric thin-film platform.

ABSTRACT: Photonic-integrated circuits (PICs) using ferroelectric materials are expected to be used in many applications because of its unique optical properties such as large electro-optic coefficients. In this study, a novel PIC based on a ferroelectric thin-film platform was designed and fabricated, where high-speed optical modulator, spot-size converters (SSCs), and a variable optical attenuator (VOA) were successfully integrated. A ferroelectric lanthanum-modified lead zirconate titanate (PLZT) thin film was epitaxially-grown by using a modified sol-gel method, and it exhibits large electro-optic coefficients (>120?pm/V) and low propagation loss (1.1?dB/cm). The optical modulator, a Mach-Zehnder type, exhibited a half-wave voltage (V_?) of 6.0?V (V_?L?=?4.5 Vcm₎ and optical modulation up to 56?Gb/s. Also, the VOA (with attenuation range of more than 26?dB) was successfully integrated with the modulator. As a result, it is concluded that the developed ferroelectric platform can pave the way for photonic integration.

SUBMITTER: Abe S

PROVIDER: S-EPMC6851366 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Photonic integration based on a ferroelectric thin-film platform.

Abe Shunsuke S Joichi Tomoki T Uekusa Kouichiro K Hara Hideo H Masuda Shin S

Scientific reports 20191112 1

Photonic-integrated circuits (PICs) using ferroelectric materials are expected to be used in many applications because of its unique optical properties such as large electro-optic coefficients. In this study, a novel PIC based on a ferroelectric thin-film platform was designed and fabricated, where high-speed optical modulator, spot-size converters (SSCs), and a variable optical attenuator (VOA) were successfully integrated. A ferroelectric lanthanum-modified lead zirconate titanate (PLZT) thin ...[more]

PMID: 31719594

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