Active Manipulation Of Electromagnetically-induced Transparency Via Magnetostatic And Thermal Tunability And The Effect Of Disorder Resonance In Terahertz Metamaterial

Metamaterial is a kind of artificial structure, which provides a unique method forachieving all kinds of unusual functionalities owing to its fascinating properties andpotential application. So far, Metamaterial has a great achievement in terahertz field.Micking the quantum phenomena of electromagnetic-induced transparency (EIT) andexploring the coupling mechanism in metamaterial systems has recently raisedenormous interest. Varieties of metamaterial structures have been proposed to exciteand manipulate the EIT effect via changing the geometrical parameters. However, it isdifficult to change the geometrical sizes of elements after fabrication. Therefore,active manipulation of EIT is of great significance.Great effort has been taken to investigate the periodic samples of metamaterial,while the aperiodic is inevitable and existing extensively. Through studying theproperties of aperiodic or disorder Metamaterial structure, it paves the way to thefurther application.Based on the above researches, we will study the coupling of metamaterial interahertz wave through two phenomena, that is to say, investigating active control ofEIT by the applied magnetic field and the temperature and the coupling mechanism ofan aperiodic or disorder metamaterial structure. In this article, we propose the design,fabrication of the metamaterial with theoretical, numerical and experimental analysis.The main thesis is just as follows:1. Active manipulation of EIT. First we will research previous literature andsummarize. Based on this, we design a novel metamaterial structure to generate EIT.With the external magnetic field and temperature increasing, a dynamic activecontrolled EIT in terahertz regime is demonstrated. It benefits the further application.2. The research of disorder metamaterial. We designed a new metamaterialstructure. In periodic case, the spectra responses of samples vary with rotation. Bycutting periodic sample into different scales, the disorder is induced, exploring thedisorder effect through samples respectively. Further, we study the change of theresonance characteristics compared to the periodic samples. Besides, we build a newfiber-transmission THz-TDS which makes the terahertz wave through the sampleperpendicularly with much more flexible.