首页|High photoelectric conversion efficiency and fast relaxation time of FA0.4MA0.6PbI3 applied in ultrafast modulation of terahertz waves

High photoelectric conversion efficiency and fast relaxation time of FA0.4MA0.6PbI3 applied in ultrafast modulation of terahertz waves

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Active control of terahertz(THz)waves is attracting tremendous attentions in terahertz communications and active photonic devices.Perovskite,due to its excellent photoelectric conversion performance and simple manufacturing process,has emerged as a promising candidate for optoelectronic applications.However,the exploration of perovskites in optically controlled THz modulators is still limited.In this work,the photoelectric properties and carrier dynamics of FA0.4MA0.6PbI3 perovskite films were investi-gated by optical pumped terahertz probe(OPTP)system.The ultrafast carrier dynamics reveal that FA0.4MA0.6PbI3 thin film exhibits rapid switching and relaxation time within picosecond level,suggesting that FA0.4MA0.6PbI3 is an ideal candidate for active THz devices with ultrafast response.Furthermore,as a proof of concept,a FA0.4MA0.6PbI3-based metadevice with integrating plasma-induced transparency(PIT)effect was fabricated to achieve ultrafast modulation of THz wave.The experimental results demon-strated that the switching time of FA0.4MA0.6PbI3-based THz modulator is near to 3.5 ps,and the thresh-old of optical pump is as low as 12.7 μJ cm-2.The simulation results attribute the mechanism of ultrafast THz modulation to photo-induced free carriers in the FA0.4MA0.6PbI3 layer,which progressively shorten the capacitive gap of PIT resonator.This study not only illuminates the potential of FA0.4MA0.6PbI3 in THz modulation,but also contributes to the field of ultrafast photonic devices.

Terahertz modulationPerovskitesMetamaterialsPlasmon-induced transparency

Zhibo Xu、Ying Zeng、Xinran Zhao、Xiaoyin Chen、Aoyu Fan、Furi Ling、Jiang Li、Jianquan Yao

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School of Optics and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China

School of Information Engineering Wuhan University of Technology,Wuhan 430070,Hubei,China

National Engineering Research Center of Fiber Optic Sensing Technology and Networks,Wuhan University of Technology,Wuhan 430070,Hubei,China

Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks,Wuhan 430070,Hubei,China

Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China

College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China

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国家自然科学基金国家自然科学基金Analytical and Testing Center in Huazhong University of Science and Technology for XRD and FSEM analysis

U193011712204445

2024

10.1016/j.jechem.2023.12.037

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.91(4)
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