Jie Liao

Beijing Information Science & Technology University

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Yingjie Xu

Beijing Information Science & Technology University

Guang Chen

Taizhou University

Lianqing Zhu

Beijing Information Science & Technology University

Jian Zhen Ou

Southwest Jiaotong University

Lidan Lu

Beijing Information Science & Technology University

Xiaofeng Xu

Anhui Polytechnic University

Jin Zhang

Max Planck Institute of Quantum Optics

Mingli Dong

Beijing Information Science & Technology University

Lidan Lu

Beijing Information Science & Technology University

Bofei Zhu

Tsinghua University

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Beijing Information Science & Technology University

Tianjin University

Beijing University of Technology

Beijing Municipal Education Commission

Hefei University of Technology

Ministry of Education of the People's Republic of China

Guangxi Normal University

Guangdong Institute of Intelligent Manufacturing

Max Planck Institute of Quantum Optics

Sichuan University

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A Tunable Multi-Port Fano Resonator Based on Mach-Zehnder Interferometers Coupling with Micro-Ring Resonators

Photonics (2022)

Yingjie Xu Lidan Lu Guang Chen Jie Liao Xiaofeng Xu

Fano resonance has an asymmetric and sharp resonance peak near the resonance wavelength, which can effectively enhance the all-optical signal processing capability and realize silicon photonic switches, sensors, and modulators. In this paper, a silicon photonic Fano resonator with Mach-Zehnder interferometer (MZI) structure coupling with micro-ring resonators (MRR) is designed. Two MRRs with different quality factors are coupled with two arms of an MZI, and the coupling zone is composed of two half-ring waveguides. Based on the transfer matrix method, the intrinsic and modulated transfer characteristics of the component are analyzed. By adjusting the optical amplitude and phase of MZIs and tuning the resonance wavelength of two MRRs, Fano resonance spectra are simulated at four output ports with the highest extinction ratios of 56.19 dB and maximum slope rates at 2175.74 dB/nm, and the transmission spectra of Fano resonance at the four output ports are experimentally demonstrated. As the four Fano resonance ports of the designed component have different performances, they can be used for various functions simultaneously. The advantage of the proposed scheme is the improvement of the multiplexing capacity and simultaneous utilization of the muti-port for the Fano resonator. Our four-port Fano resonator can be employed in the fields of optical switching, optical computing, and optical interconnect in the future.

Fano resonance

10.3390/photonics9100725

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Citations (5)

T-shaped silicon waveguide coupled with a micro-ring resonator-based Fano resonance modulator

Applied Optics (2022)

Yingjie Xu Lidan Lu Guang Chen Jie Liao Xiaofeng Xu

Fano resonance has an asymmetric and sharp resonance peak near the resonance wavelength, enhancing optical modulation performance. Here, a Fano resonant silicon optical modulator with a micro-ring resonator (MRR) coupled with a T-shaped waveguide is designed. Compared with an MRR modulator, a Fano resonance-based modulator has a smaller wavelength range of changes in optical intensity (from 0 a.u. to 1 a.u.). Under the condition of achieving the same light intensity change, Fano resonance only needs to shift the wavelength by 0.07 times compared with MRR. By optimizing the doping section and the Fano resonance line shape, the modulation depth of the Fano modulator is 12.44 dB, and an insertion loss of 0.41 dB is obtained. Moreover, it improves the modulation linearity. This modulator provides a new idea, to the best of our knowledge, for the single-cavity Fano resonance modulator.

Fano resonance

Waveguide

Modulation (music)

Fano plane

Electro-optic modulator

Free spectral range

10.1364/ao.466288

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Citations (4)

A Fano resonance electro-optic modulator with high modulation efficiency in photonic multiplying

Optics and Lasers in Engineering (2025)

Yingjie Xu Lidan Lu Bofei Zhu Guang Chen Jie Liao