Research on the Resonance Properties of E-Type Nano Antenna

Abstract

Finite Difference Time Domain method(FDTD) is used to study the resonance properties of E-type nano antenna in this paper. According to the result of numerical simulation,the size and location of ledge part made a great influence on the resonance properties of holistic nano antenna while major rectangle part is invariant.The electronic field distribution, enhancement factor and corresponding resonance frequency of E-type nano antennas with invariant major rectangle part and different ledge parts are calculated through FDTD method,comparing with rectangle nano antenna without ledge part, E-type nano antenna has a great promotiom in electronic field enhancement at about 100 times of the excite electronic field intensity while regular rectangle nano antenna can achieve about 30times only.The resonance frequency is relate to the ledge part ,by changing the size and location of ledge part,resonant frequency can be adjusted between 340Thz and 400Thz,at the meantime, the field enhancement almost unchanged. After a glass substrate is added under the E-type nano antenna with constant size,the electronic field intensification factor improved significantly and the electronic field spread over the area around the ledge part rather than the junction of glass and metal.The horizontal position of ledge part has an effect on holistic resonance properties.When the ledge part located in the middle, the electronic field intensification factor of three ledge parts rised to 240 times at the same time,and distinct double resonance peak appeared.When the ledge part moved to the edge, the electronic field enhancement around the ledge parts on the sides weaken and middle ledge part rised to 350 times,double resonance peak disappeared.