Morphology engineering of a hybrid perovskite for active terahertz memory modulation

Author:

Wang Xinyue1,Weng Jiexin1,Xu Meng1,Li Xiang1,Yang Tingting1,Hou Yanbing2,Shen Jingling1,Zhang Bo1

Affiliation:

1. Capital Normal University

2. Beijing Jiaotong University

Abstract

Morphology engineering was investigated for hybrid perovskites CH3NH3PbI3:Ag/Poly(3, 4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) that were fabricated in both air and nitrogen environments for active terahertz (THz) memory modulation. Under low optical excitation or an applied bias, THz amplitude modulation or rapid restore in both CH3NH3PbI3:Ag/PEDOT:PSS hybrid structures were demonstrated. The recovery time of the modulated THz wave in the sample fabricated in air was considerably longer than that of the sample fabricated in nitrogen because of defect states induced by a high degree of roughness. THz transmissions were used as coded pixel units and were programmed to store a 4×4 image or a multi-order signal. Hence, active THz memory modulation was demonstrated. It also has potential applications as a visible to near-infrared broad-spectrum light detector.

Funder

National Natural Science Foundation of China

Beijing Municipal Natural Science Foundation

Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Five-year Plan

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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