Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/1332
Title: Asymmetric Light Transmission in PT-Symmetric Microring Resonators
Authors: Giden, İbrahim Halil
Dadashi, Khalil
Botey, Muriel
Herrero, Ramon
Staliunas, Kestutis
Kurt, Hamza
200103
Keywords: Microphotonics
optical systems
parity-time symmetry
photonic devices
resonators
Issue Date: 2016
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Source: Giden, I. H., Dadashi, K., Botey, M., Herrero, R., Staliunas, K., & Kurt, H. (2016). Asymmetric light transmission in PT-symmetric microring resonators. IEEE Journal of Selected Topics in Quantum Electronics, 22(5), 19-24.
Abstract: We propose a new type of add-drop microring resonator made of gain and loss materials. Microring resonators are compact, narrow band, and optical channel dropping filters. In such linear systems, light transmission to side-coupled signal waveguides is always symmetric. However, we prove that properly arranging a gain and loss modulation in the microring resonator provides a new functionality: asymmetric transmission; so that different resonant modes can be promoted depending on the input channel. This can be achieved when the resonator holds parity-time (PT-) symmetry, with periodic gain-loss and index modulations. PT-symmetry in optics generally requires that the index and gain-loss modulations are dephased by a quarter of the wavenumber of the modulation. Besides, we show that a simple half-gain half-loss microring also produces analogous results to a periodic PT-symmetric system. The results are numerically proved and also accounted by a simple analytical model. The effect of using complex modulated resonators with smaller periodicities is also analyzed.
URI: https://ieeexplore.ieee.org/document/7433943
https://hdl.handle.net/20.500.11851/1332
ISSN: 1077-260X
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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