Open AccessLow-threshold bistability in nonlinear microring tower resonator
Author(s) -
Mehdi Shafiei,
Mohammad Khanzadeh
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.025509
Subject(s) - resonator , bistability , optical bistability , optics , nonlinear system , physics , nonlinear optics , kerr effect , q factor , coupled mode theory , optoelectronics , refractive index , laser , quantum mechanics
Microring tower resonators, which are a chain of microring resonators stacked on top of each other, are of great interest for nonlinear optics due to their unique features such as very high compactness, coupling efficiency and quality factor. In this research, we investigate the optical bistability in microring tower (MRT) with Kerr nonlinearity by using the coupled mode theory, and demonstrate how a proper defect into the structure can lead to low threshold bistability. In particular, we observed optical bistability in nonlinear defect modes with switching power as low as 165 μW through numerical calculations in a structure with a overall loss on the order of 0.01 mm. In addition, we also develop an analytical model that excellently gives the position of defect modes in linear regime.