Y-shaped magnonic demultiplexer using induced transparency resonances
Open Access
- 1 March 2019
- journal article
- research article
- Published by AIP Publishing in AIP Advances
- Vol. 9 (3)
- https://doi.org/10.1063/1.5080350
Abstract
We give an analytical demonstration of the possibility to realize a simple magnonic demultiplexer based on induced transparency resonances. The demultiplexer consists on an Y-shaped waveguide with an input line and two output lines. Each line contains two grafted stubs at a given position far from the input line. We derive in closed form the analytical expressions for selective transfer of a single propagating mode through one line keeping the other line unaffected. This is performed through magnonic induced transparency resonances (MIT) characterized by a resonance squeezed between two transmission zeros. The existence of a complete transmission beside a zero transmission, enables to select a given frequency on one output line, by canceling the transmission on the second line as well as the reflection in the input line. Also, we show that despite the existence of a bifurcation of the input line on two output lines, the transmission through each line can be written following a Fano line shape. In addition, in order to understand better the scattering properties of the filtered resonances, we give the analytical expressions of Fano parameter q and quality factor Q of the MIT resonance in each line. The spatial distribution of the spin waves associated to different MIT resonances is performed through an analysis of the magnetization of these modes. Also, the effect of attenuation on the transmission spectra and the quality of demultiplexing is also discussed. The theoretical results are performed using the Green's function approach which enables to deduce in closed form, the transmission and reflection coefficients as well as the densities of states. (C) 2019 Author(s).Keywords
This publication has 49 references indexed in Scilit:
- Experimental controlling of Fano resonance in indirectly coupled whispering-gallery microresonatorsApplied Physics Letters, 2012
- Magnonic circuits and crystalsSurface Science Reports, 2011
- Evidence of Fano-like resonances in mono-mode magnetic circuitsPhysical Review B, 2008
- Transmission gaps and Fano resonances in an acoustic waveguide: analytical modelJournal of Physics: Condensed Matter, 2008
- Experimental Realization of an On-Chip All-Optical Analogue to Electromagnetically Induced TransparencyPhysical Review Letters, 2006
- Electromagnetically induced transparency with tunable single-photon pulsesNature, 2005
- Spin-wave logical gatesApplied Physics Letters, 2005
- Stopping Light All OpticallyPhysical Review Letters, 2004
- Theory of elementary excitations in quasiperiodic structuresPhysics Reports, 2003
- On the Theory of Ferromagnetic Resonance AbsorptionPhysical Review B, 1948