Thickness-modulated in-plane Bi2O2Se homojunctions for ultrafast high-performance photodetectors<xref rid="cpb_28_12_128502fn1" ref-type="fn">*</xref><fn id="cpb_28_12_128502fn1"><label>*</label>Project supported by the National Natural Science Foundation of China (Grant No. 61705066), the Open Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China (Grant No. IPOC2018B004), and the National Key Research and Development Program, China (Grant No. 2016YFA0202401).</fn>

Thickness-modulated in-plane Bi₂O₂Se homojunctions for ultrafast high-performance photodetectors**

Project supported by the National Natural Science Foundation of China (Grant No. 61705066), the Open Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China (Grant No. IPOC2018B004), and the National Key Research and Development Program, China (Grant No. 2016YFA0202401).

Hong Cheng-Yun¹, Huang Gang-Feng¹, Yao Wen-Wen², Deng Jia-Jun², Liu Xiao-Long^{1, 3, †}

The optical microscopic images of as-synthesized Bi₂O₂Se IPJs across mica steps showing ((a), (b)) three Bi₂O₂Se films affected by the same mica layer edge obviously.