title: Tunable asymmetrical Fano resonance and bistability in a microcavity-resonator-coupled Mach-Zehnder interferometer.
abstract: We propose a simple microresonator scheme for a Mach-Zehnder interferometer in which a microresonator is side coupled to one arm and a phase shifter is introduced into the other arm, to produce an asymmetric Fano-resonance line shape. In this system, a phase shifter is used to control the variation of the asymmetric line shape, with another reverse resonance next to a resonance minimum over a very narrow frequency range, which results from the interference between a direct channel and a high-Q resonance indirect channel. We also theoretically investigate the novel bistability characteristic based on these shapes.
authors.affiliation: College of Precision Instrument and Opto-Electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, China. lingguren@yahoo.com.cn
authors.forename: Ying
authors.initials: Y
authors.lastname: Lu
authors.forename: Jianquan
authors.initials: J
authors.lastname: Yao
authors.forename: Xifu
authors.initials: X
authors.lastname: Li
authors.forename: Peng
authors.initials: P
authors.lastname: Wang