基于光学tamm态的石墨烯光开关的研究
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摘要
提出了一种基于光学tamm态(OTS)的石墨烯光开关方案。在该方案中,利用在金属-分布式布拉格反射镜界面处产生的OTS,以及石墨烯的电控特性,通过改变外加电压来改变石墨烯的折射率,使OTS的本征波长发生漂移,光的反射率由最低点上升至高反射区,从而实现光开关的通断控制。利用有限元法和时域有限差分法对提出的光开关进行了仿真研究。研究结果表明,当入射波长为846.5nm时,可以实现光开关,其插入损耗为0.88dB,消光比约为12.7dB,响应时间约为1.36ps。该光开关具有插入损耗低和响应时间快的优势,在未来的光通信系统和光信息处理系统中具有很好的应用前景。
An optical switching scheme of graphene based on Optical Tamm States(OTS)is proposed.In this scheme,the OTS are generated at the interface between the metal and the Distributed Bragg Reflection(DBR)using the electronic properties of graphene.The intrinsic wavelength of OTS shifts and the reflectivity of light rises from the lowest point to a high reflection region.By changing the applied voltage,the optical switch can be achieved.The proposed optical switch is simulated by using the Finite Element Method(FEM)and the Time Domain Finite Difference(FDTD)method.The results show that when the incident wavelength is 846.5 nm,the optical switch can be achieved.The insertion loss of the optical switch is 0.88 dB with extinction ratio of 12.7 dB and response time of 1.31 ps.The optical switch has the advantages of low insertion loss and fast response time.It has a good application prospect in the future optical communication system and the optical information processing system.
An optical switching scheme of graphene based on Optical Tamm States(OTS)is proposed.In this scheme,the OTS are generated at the interface between the metal and the Distributed Bragg Reflection(DBR)using the electronic properties of graphene.The intrinsic wavelength of OTS shifts and the reflectivity of light rises from the lowest point to a high reflection region.By changing the applied voltage,the optical switch can be achieved.The proposed optical switch is simulated by using the Finite Element Method(FEM)and the Time Domain Finite Difference(FDTD)method.The results show that when the incident wavelength is 846.5 nm,the optical switch can be achieved.The insertion loss of the optical switch is 0.88 dB with extinction ratio of 12.7 dB and response time of 1.31 ps.The optical switch has the advantages of low insertion loss and fast response time.It has a good application prospect in the future optical communication system and the optical information processing system.
引文
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[2]郭燕.基于热极化双孔光纤的电调谐光开关的研究[D].北京:北京交通大学,2016.
[3]刘通.长程表面等离子波导热光开关器件研究[D].长春:吉林大学,2016.
[4]张德喜,郑琳.基于单片机的声光开关控制系统的设计与实现[J].电子测试,2016,(8):17-18.
[5] Kavokin A V,Shelykh I A,Malpuech G.Lossless Interface Modes at the Boundary between Two Periodic Dielectric Structures[J].Phys Rev B,2005,72(23):233102-233104.
[6] Guo J,Sun Y,Zhang Y,et al.Experimental Investigation of Interface States in Photonic Crystal Heterostructures[J].Physical Review E,2008,78(2):026607.
[7] Kaliteevski M,Iorsh I,Brand S,et al.Tamm PlasmonPolaritons:Possible Electromagnetic States at the Interface of a Metal and a Dielectric Bragg Mirror[J].Physical Review B,2007,76(16):165415(5).
[8]荆庆丽,杜春光,高健存.表面等离子共振现象的新应用——微弱磁场的测量[J].物理学报,2013,62(3):342-347.
[9]王建敏.基于石墨烯的电光调制器的结构设计及其特性研究[D].成都:电子科技大学,2014.
[10]Park J,Kim H,Lee B.High Order Plasmonic Bragg Reflection in the Metal-Insulator-Metal Waveguide Bragg Grating[J].Optics Express,2008,16(1):413-425.
[11]Chen X F,Li S J,Zhang Y,et al.The Wide-Angle Perfect Absorption based on the Optical Tamm States[J].Optoelectronics Letters,2014,10(4):317-320.
[12]吴凯.基于表面等离激元和光学Tamm态的新型热电子光电探测研究[D].苏州:苏州大学,2016.
[13]李婷婷.石墨烯电吸收调制器的基础研究[D].成都:电子科技大学,2015.
[14]Miloua R,Kebbab Z,Chiker F,et al.Peak,MultiPeak and Broadband Absorption in Graphene-based One-Dimensional Photonic Crystal[J].Optics Communications,2014,330:135-139.
[15]陈鹤鸣,卫晓颖.高速光子晶体光开关的设计[J].光电工程,2013,40(11):34-39.