基于Ge_(2)Sb_(2)Te_(5)相变材料的可调谐近红外光学超构表面吸收器  

Tunable near-infrared optical superstructure surface absorber based on Ge_(2)Sb_(2)Te_(5) phase change material

作　　者：赵钰 翟凤潇 张晓冬 刘楠楠 杨坤 ZHAO Yu;ZHAI Fengxiao;ZHANG Xiaodong;LIU Nannan;YANG Kun(School of Physics and Electronic Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China)

机构地区：[1]郑州轻工业大学物理与电子工程学院,郑州450001

出　　处：《光通信技术》2023年第4期21-25,共5页Optical Communication Technology

基　　金：河南省科技公关项目(212102210604)资助;河南省高等学校重点科研项目(22A140011)资助。

摘　　要：为了实现红外吸收波长的主动调控,提出一种Ge_(2)Sb_(2)Te_(5)(GST)相变材料的可调谐金属/介质/金属(MDM)型近红外光学超构表面吸收器。首先,采用时域有限差分(FDTD)法对器件的吸收性能进行仿真分析;然后,根据电场分布特点分析了吸收器等离子体震荡吸收的物理机制。仿真结果表明:当改变GST的晶化分数时,所提吸收器实现了吸收峰中心位置从1.17μm偏移到1.8μm,偏移宽度为630 nm,吸收器在通信波长为1.55μm时可以实现高-低吸收率的转换。A tunable metal/medium/metal type(MDM)near-infrared optical surface absorber based on Ge_(2)Sb_(2)Te_(5)(GST)phase change material is proposed to realize active regulation of infrared absorption wavelength.Firstly,the absorption performance of the device is calculated and analyzed by using the finite difference time domain(FDTD)method.Then,the physical mechanism of plasma shock absorption of the absorber is analyzed according to the electric field distribution characteristics.The simulation results show that the absorption peak center position of the proposed absorber is shifted from 1.17μm to 1.8μm,and the deviation width is 630 nm.When the appropriate crystallization fraction of GST is selected,the absorber can achieve a high-low absorptivity conversion at a communication wavelength of 1.55μm.

关 键 词：超构表面 吸收器 Ge_(2)Sb_(2)Te_(5)相变材料 

分 类 号：TN256[电子电信—物理电子学]