Kai Tang, Jialin Song, Ang Li, Haiming Zhang, Mingming Jiang
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引用次数: 0
Abstract
Bipolar photoresponse photodetectors enable spectral discrimination and optical logic, but conventional devices often suffer from poor stability and complex fabrication. Here, we report a fully solid-state, chip-scale BaTiO3/ZnO heterojunction photodetector with a simple structure, compact size, and precise wavelength discrimination. Under self-powered operation, it selectively detects 330 nm and 395 nm light with positive and negative photocurrents, showing responsivities of 6.7 and -26.1 mA/W, respectively. Fast response and narrow wavelength selectivity (∼67 nm) are achieved via optimized pyroelectric current regulation. The interplay between the photovoltaic effect in the heterojunction and the polarization of the BaTiO3 is investigated. Finally, a 5 × 5 BaTiO3/ZnO array was further demonstrated for encrypted imaging. This work presents a compact, high-performance platform for precise light-wavelength discrimination, optical logic, and secure optical communication.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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