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Non-reciprocity using quadrature-phase time-varying slab resonators
Chegnizadeh, M ; Sharif University of Technology | 2020
437
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- Type of Document: Article
- DOI: 10.1364/JOSAB.37.000088
- Publisher: OSA - The Optical Society , 2020
- Abstract:
- In this paper, it is shown that non-reciprocity can be observed in time-varying media without employing spatiotemporal modulated permittivities. We show that by using only two one-dimensional Fabry–Perot slabs with time-periodic permittivities having quadrature-phase difference, it is possible to achieve considerable non-reciprocity in transmission at the incidence frequency. To analyze such a scenario, generalized transfer matrices are introduced to find the wave amplitudes of all harmonics in all space. The results are verified by in-house finite-difference time-domain simulations. Moreover, in order to have a simple model of such time-varying slab resonators, a time-perturbed coupled-mode theory is developed for multiple resonances, and it is shown that the results obtained by this method and the analytical method are in excellent agreement. © 2020 OSA - The Optical Society. All rights reserved
- Keywords:
- Finite difference time domain method ; Permittivity ; Resonators ; Transfer matrix method ; Analytical method ; Coupled mode theory ; Finite difference time domain simulations ; Multiple resonances ; Quadrature phase ; Simple modeling ; Transfer matrixes ; Wave amplitudes ; Time domain analysis
- Source: Journal of the Optical Society of America B: Optical Physics ; Volume 37, Issue 1 , 2020 , Pages 88-97
- URL: https://www.osapublishing.org/josab/abstract.cfm?uri=josab-37-1-88