Field Tunable Polaritonic Band Gaps in Fibonacci Piezoelectric Superlattices  

作　　者：唐政华 蒋正生 蒋纯志 雷大军 黄健全 邱枫 邓海明 姚敏 黄小益 

机构地区：[1]Xiangnan University-Gospell Joint laboratory of Microwave Communication Technology, college of Electronic Information and Electrical Engineering, Xiangnan University [2]National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University

出　　处：《Chinese Physics Letters》2018年第7期45-48,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11705155;the Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province;the Projects of Hunan Provincial Education Office under Grant Nos 16B243,17B244 and 16A199;the Chenzhou City Science and Technology Project under Grant Nos CZ2014042 and jsyf2017005

摘　　要：The Fibonacci piezoelectric superlattices（FPSs） with an external dc electric field is presented, in which the dc electric field can tune the bandwidth of polaritonic band gaps（PBGs） continuously and reversibly via the electrooptic effect. The absolute bandwidths of two major PBGs of the FPSs around ω= 7.5 GHz and ω = 12.5 GHz can be broadened from 0.022 GHz to 0.74 GHz and from 0.02 GHz to 0.82 GHz with the dc electric field increasing from 0 to 1.342 × 10^6 V/m, respectively. The corresponding relative bandwidths of the two major PBGs are widened from 0.28% to 9.2% and from 0.18% to 6.35%, respectively. The general mechanism for the bandwidth tunability is that the coupling strength between the lattice vibration and electromagnetic waves is capable of being altered by the dc electric field via the electro-optic effect. Thus the properties can be applied to construct microwave switchings or field tunable bulk acoustic filters.The Fibonacci piezoelectric superlattices（FPSs） with an external dc electric field is presented, in which the dc electric field can tune the bandwidth of polaritonic band gaps（PBGs） continuously and reversibly via the electrooptic effect. The absolute bandwidths of two major PBGs of the FPSs around ω= 7.5 GHz and ω = 12.5 GHz can be broadened from 0.022 GHz to 0.74 GHz and from 0.02 GHz to 0.82 GHz with the dc electric field increasing from 0 to 1.342 × 10^6 V/m, respectively. The corresponding relative bandwidths of the two major PBGs are widened from 0.28% to 9.2% and from 0.18% to 6.35%, respectively. The general mechanism for the bandwidth tunability is that the coupling strength between the lattice vibration and electromagnetic waves is capable of being altered by the dc electric field via the electro-optic effect. Thus the properties can be applied to construct microwave switchings or field tunable bulk acoustic filters.

分 类 号：O73[理学—晶体学]