Wen Li, Hengzhen Cheng, Caiyu Feng, Weiyi Zhou and Bo Zhang*,
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Mechanism and Application of Optical Modulation of Terahertz Waves in a Perovskite Heterojunction
We investigated the mechanism and application of the modulation of terahertz waves using perovskite heterostructures. At the interface between PEDOT:PSS and the perovskite layers under excitation by an external light source, photogenerated carriers transferred from the perovskite layer to the PEDOT:PSS layer, which was accompanied by charge accumulation. A large number of photogenerated carriers scattered terahertz waves, thereby modulating the terahertz signal in the sample. The process of modulation and recovery of the terahertz signal by a perovskite material under external light is analogous to the principle of biological synapses, which are involved in memory and learning in animal brains. This enabled us to develop perovskite-based synaptic devices. The memory properties of perovskite heterojunction materials open up applications of terahertz technology.
期刊介绍：
ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric.
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