Affiliation:
1. Zhejiang University
2. Institute of Advanced Technology, Westlake Institute for Advanced Study
Abstract
Mechanically flexible photonic devices are critical components of novel bio-integrated optoelectronic and high-end wearable systems, in which thermo-optic switches (TOSs) as optical signal control devices are crucial. In this paper, flexible titanium oxide (TiO2) TOSs based on a Mach–Zehnder interferometer (MZI) structure were demonstrated around 1310 nm for, it is believed, the first time. The insertion loss of flexible passive TiO2 2 × 2 multi-mode interferometers (MMIs) is −3.1 dB per MMI. The demonstrated flexible TOS achieves power consumption (Pπ) of 0.83 mW, compared with its rigid counterpart, for which Pπ is decreased by a factor of 18. The proposed device could withstand 100 consecutive bending operations without noticeable degradation in TOS performance, indicating excellent mechanical stability. These results provide a new perspective for designing and fabricating flexible TOSs for flexible optoelectronic systems in future emerging applications.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Zhejiang Province
Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang
MOE Frontier Science Center for Brain Science & Brain-Machine Integration, Zhejiang University
Subject
Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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