DataVXAdvanced Materials TechnologiesPaper
journal article·2020-04

NIR Light Driven Terahertz Wave Modulator with a Large Modulation Depth Based on a Silicon‐PEDOT:PSS‐Perovskite Hybrid System

Weien Lai, Chengda Ge, Hao Yuan, Qingfeng Dong, Deren Yang, Yanjun Fang

Advanced Materials Technologies· Volume 5· Issue 4
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Source abstract

Abstract

Abstract Terahertz (THz) all‐optical modulation, that is, the transformation from optical signal to THz signal, is critical for the THz communication system. Here, an ultrasensitive all‐optical modulator for THz waves based on a silicon‐poly(3,4‐ethylenedioxythiophene)/poly(styrene sulfonate) (PEDOT:PSS)‐perovskite hybrid system is presented, with the silicon substrate as the photon absorption layer, which enables its near‐infrared (NIR) light driven THz modulation and exhibits a large modulation depth up to −45 dB under a moderate light intensity of 2.18 W cm−2. The enhanced modulation mechanism of the hybrid system is investigated, which demonstrates the essential role of PEDOT:PSS and passivated perovskite layers in promoting the charge separation at the interface and therefore increasing the surface photoconductivity of the device under light irradiation. This study opens a new window for the design and preparation of high‐performance THz photonic devices.
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Research context

Electronic materials

OpenAlex topics: Terahertz technology and applications · Perovskite Materials and Applications · Photonic and Optical Devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Engineering Laboratory of Special Display Technology Special Display and Imaging Technology Innovation Center of Anhui Province Academy of Opto‐Electric Technology HeFei University of Technology Hefei 230009 P. R. China

State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 P. R. China

State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou 310027 P. R. China

Funding

Natural Science Foundation of Anhui Province · National Natural Science Foundation of China · National Key Laboratory of Electronic Thin Films and Integrated Devices · Fundamental Research Funds for the Central Universities

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