摘要
随着5G时代的到来,对光子器件的集成度以及性能指标提出了更高的要求,而传统器件存在不可调谐、效率低和稳定性差等弊端,限制了其在高集成度、高传输速度光通讯的应用。近年来,金刚石优异的热导率和高折射优势使其成为了研究电磁吸收器件中介质材料的最优材料之一,而石墨烯所具有磁场诱导下的离散朗道能级、可调谐化学势和易于激发太赫兹SPP等,在解决该问题中发挥着至关重要的作用。在此研究背景下,开展了基于石墨烯和金刚石的可调谐光子器件的研究,利用石墨烯化学势可调谐并且易于激发太赫兹SPP的特性,设计了一种相位型调制双带完美吸收器。研究了金刚石介质厚度、石墨烯化学势和入射角度等参量对电磁吸收器吸收性能的影响规律。该器件实现了对太赫兹信号的吸收,具有可调谐、吸收率高和稳定性强等优势。
With the advent of 5G era,higher requirements are put forward for the integration and performance index of photonic devices.However,the disadvantages of traditional devices,such as non-tuning,low efficiency and poor stability,limit their application in optical communication with high integration and high transmission speed.In recent years,the excellent thermal conductivity and high refraction of diamond make it one of the best materials for studying dielectric materials in electromagnetic absorption devices,Graphene's characteristics,including discrete Landau energy level induced by magnetic field,tunable chemical potential and easy excitation of THz SPP,play a vital role in solving this problem.Under this research background,the tunable photonic devices based on graphene and diamond are studied in this paper.A phase-modulated double-band perfect absorber is designed based on the tunable chemical potential of graphene and easy excitation of THz SPP.The effects of diamond dielectric thickness,graphene chemical potential and incident angle on the absorption performance of electromagnetic absorber were studied.it is found that the dielectric thickness of diamond shows a periodic modulation effect on the absorption rate,and the high refractive index of diamond can reduce the thickness of dielectric layer,which is easy to miniaturize the device.Therefore,the device realizes the absorption of terahertz signals,and has the advantages of tunability,high absorption rate and strong stability.
作者
张少伟
翟沐华
王玮
张明辉
问峰
王宏兴
ZHANG Shaowei;ZHAI Muhua;WANG Wei;ZHANG Minghui;WEN Feng;WANG Hongxing(Xi'an Jiaotong University,Xi'an 710049,China)
出处
《超硬材料工程》
CAS
2024年第4期1-6,共6页
Superhard Material Engineering
基金
国家自然科学基金面上基金项目“基于固态原子相干新型可调谐光子器件的研究”(编号:62074127)。
