Nonreciprocal transmission in a parity-time symmetry system with two types of defects
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Min Luo
Abstract
In this paper, we have studied two different mechanisms of nonreciprocal and asymmetric transmission in the one-dimensional asymmetric optical system composed of parity-time (PT) and magneto-optical materials with different defect layers. It is shown that there are three pairs of nonreciprocal dispersive curves with the perfect transmission in the three different band gaps, when the defect layer is filled with normal material. When the defect layer is filled with magneto-optical material, the transmittivity of two nonreciprocal frequencies can be modulated by the magnitude and direction of the defect layer’s external magnetic field and appears to be asymmetric nonreciprocal transmission. One-way frequency corresponding to one direction has extraordinary transmission, and the other one-way frequency corresponding to the opposite direction is suppressed. When the defect layer is filled with loss or gain material, the transmittivity of two nonreciprocal frequencies can be amplificated or attenuated simultaneously, respectively. The nonreciprocal propagation is originated from the resonant modes in the system due to the defect layer, and the nonreciprocal and asymmetric transmission is determined by the broken PT system due to magneto-optical and gain/loss material in the defect layer. Such controllable and asymmetric nonreciprocal propagation in the composite system may have broad potential applications in nonreciprocal communication and integration devices.
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission. Min Luo and Xiaomeng Zhang contributed equally to this article.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Atomic, Molecular & Chemical Physics
- Nonhomogeneous multicolor laser beams optimization to obtain a stronger intensity single harmonic radiation path
- Dynamical Systems & Nonlinear Phenomena
- Predator-dependent transmissible disease spreading in prey under Holling type-II functional response
- Static and dynamic performances of ferrofluid lubricated long journal bearing
- Solid State Physics & Materials Science
- Nonreciprocal transmission in a parity-time symmetry system with two types of defects
- First principles study of the structural, electronic, optical and thermodynamic properties of cubic quaternary AlxIn1−xPyBi1−y alloys
- Ultrasound-assisted green biosynthesis of ZnO nanoparticles and their photocatalytic application
- Pressure dependent ultrasonic properties of hcp hafnium metal
- A comparison study of the structural electronic, elastic and lattice dynamic properties of ZrInAu and ZrSnPt
