Please use this identifier to cite or link to this item:
Title: Asymmetric Light Transmission in PT-Symmetric Microring Resonators
Authors: Giden, İbrahim Halil
Dadashi, Khalil
Botey, Muriel
Herrero, Ramon
Staliunas, Kestutis
Kurt, Hamza
Keywords: Microphotonics
optical systems
parity-time symmetry
photonic devices
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.
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

Show full item record

CORE Recommender


checked on Sep 23, 2022


checked on Sep 24, 2022

Page view(s)

checked on Oct 3, 2022

Google ScholarTM



Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.