Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2015 - zeszyt 2

Terahertz range double direction isolator based on stratified antiferromagnetic-dielectric structures. Theoretical investigation

10.15199/13.2015.2.18

nr katalogowy: 89692
10.15199/13.2015.2.18

The terahertz frequency range is actively developed in the last decade [1-10]. Various devices have been created and variety electromagnetic structures have been utilized in this range. One of the most interesting classes of terahertz devices is the class of non-reciprocal devices [1-10]. Usually the Faraday rotation effect itself is exploited naturally to achieve desired non-reciprocal performance [1]. For instance successful application of a ferrofluid at the room temperature has been described in [2]. The electrically tunable Faraday effect in a HgTe thin film has been reported in [3]. A tunable metal/ magneto-optic plasmonic lens for terahertz isolator has been presented in [4]. Faraday rotation has also been studied for pump pulse of terahertz radiation [5]. In [6] the heterostructures based on the piezoelectric and semiconductor layers have been proposed for radio frequency applications. Another examples of nonreciprocal properties of nonlinear devises in terahertz range were presented in [7] where a Faraday isolator operating on the coupled microwave resonators circuit has been proposed. A theoretical study of the reflection of infrared radiation from antiferromagnets and M-type barium hexagonal ferrite using an attenuated total reflection geometry has been presented in [8]. Non-reciprocal devices using attenuated total reflection and thin film magnetic layered structures have been described in [9]. Theoretical and numerical results for a new method of obtaining hotspots that relies on nonreciprocal "one-way" propagation as opposed to the well-known case of resonance-based hotspots has been presented in [10]. Thus we can clear see that this topic is quite relevant in modern microwave science. In this paper we study non-reciprocal properties of antiferromagnetic material for double-direction terahertz isolator creating. The operation principle of the proposed isolator is based on a dependence of reflectivity of a[...]

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