TY - JOUR
T1 - Controlling Resonance Lineshapes of a Side-Coupled Waveguide-Microring Resonator
AU - Fang, Liang
AU - Gu, Linpeng
AU - Zheng, Jianbang
AU - Zhao, Qiang
AU - Gan, Xuetao
AU - Zhao, Jianlin
N1 - Publisher Copyright:
© 1983-2012 IEEE.
PY - 2020/8/15
Y1 - 2020/8/15
N2 - Resonance lineshapes of a side-coupled waveguide-microring resonator (MRR) is crucial for the performances of MRR-based on-chip photonic devices. Much efforts have been made to modify the resonance lineshapes to other types, such as asymmetric Fano profiles. However, complex photonic structures are required to integrate with waveguide-MRR. Here, we model the light propagation in a waveguide-MRR into the interactions of a discrete resonance mode and a continuum waveguiding mode and propose the phase delay between the two states plays great roles in controlling the resonance lineshape into symmetric Lorentzian dips, Lorentzian peaks, and Fano lineshapes with arbitrary asymmetric factors. We experimentally verify this by fabricating silicon waveguide-MRR with an air-hole inserted in the bus-waveguide section coupled with the MRR, where the air-hole with varied dimensions could control the phase delay. The results not only have potentials to strengthen the performances of MRR-based devices, but also provide a simple strategy to control resonance lineshapes in other optical resonators, including photonic crystal cavity, microtoroid, etc.
AB - Resonance lineshapes of a side-coupled waveguide-microring resonator (MRR) is crucial for the performances of MRR-based on-chip photonic devices. Much efforts have been made to modify the resonance lineshapes to other types, such as asymmetric Fano profiles. However, complex photonic structures are required to integrate with waveguide-MRR. Here, we model the light propagation in a waveguide-MRR into the interactions of a discrete resonance mode and a continuum waveguiding mode and propose the phase delay between the two states plays great roles in controlling the resonance lineshape into symmetric Lorentzian dips, Lorentzian peaks, and Fano lineshapes with arbitrary asymmetric factors. We experimentally verify this by fabricating silicon waveguide-MRR with an air-hole inserted in the bus-waveguide section coupled with the MRR, where the air-hole with varied dimensions could control the phase delay. The results not only have potentials to strengthen the performances of MRR-based devices, but also provide a simple strategy to control resonance lineshapes in other optical resonators, including photonic crystal cavity, microtoroid, etc.
KW - Fano resonance
KW - microring
KW - resonance lineshape
UR - http://www.scopus.com/inward/record.url?scp=85089875249&partnerID=8YFLogxK
U2 - 10.1109/JLT.2020.2991648
DO - 10.1109/JLT.2020.2991648
M3 - 文章
AN - SCOPUS:85089875249
SN - 0733-8724
VL - 38
SP - 4429
EP - 4434
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 16
M1 - 9082834
ER -