Fano resonance in whispering gallery mode microcavities and its sensing applications

Cai, Lu; Li, Shang-Wen; Xiang, Fu-cheng; Li, Jun; Liu, Qiang

doi:10.1016/j.optlastec.2023.109679

Cited by 7 publications

(2 citation statements)

References 104 publications

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“…In these schemes, Fano-like lineshapes are obtained by coupling a high-Q FBG with a low-Q fiber Mach-Zehnder interferometer (MZI). Compared to Fano resonances based on micro-cavity and tapered microfiber [20,21], these solutions are structurally more robust and easier to manufacture. Furthermore, the Fano-like resonances lineshapes can be flexibly adjusted by applying temperature, strain or current on the MZI to change the phase between the two arms.…”

Section: Introductionmentioning

confidence: 99%

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

Wang,

Lin,

et al. 2024

J. Phys. D: Appl. Phys.

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A novel all-optical scheme for fast modulation of Fano-like resonance using Er/Yb doped fiber (EYDF) is proposed and demonstrated experimentally. In the integrated system, an apodized fiber Bragg grating (AFBG) is inserted into one arm of the fiber Mach-Zehnder interferometer (MZI), and the asymmetric Fano-like resonances is generated by the interference between the MZI mode and AFBG mode. In addition, a section of EYDF is inserted into the other arm of the MZI to control the phase difference between the two arms of the MZI. By adjusting the power of optical pump applied to the EYDF, the transmission spectrum lineshapes of the integrated device can be effectively modulated into asymmetric Fano-like resonances, symmetric transmission dip or electromagnetically induced transparency (EIT)-like resonances, which has a fast response speed. The proposed all-optical Fano-like modulation scheme is simple in structure, and has advantages of remote control and long-term stability, providing potential applications in the fields of fast and slow light, optical filters and fiber sensing.

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Section: Introductionmentioning

confidence: 99%

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

Wang,

Lin,

et al. 2024

J. Phys. D: Appl. Phys.

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“…The structures used to excite Fano resonance are MIM waveguide coupled resonators. Microcavities can be approximately categorized into three types based on the different methods of limiting light: Fabry-Perot, photonic crystals, and whispering gallery mode microcavities [22][23][24]. Whispering gallery mode microcavities are widely used owing to their excellent performance and simple preparation.…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano resonances by MIM waveguide coupling whispering gallery mode resonator and application in Refractive index sensing

Gao,

Wang,

Chen

et al. 2024

Phys. Scr.

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In this study, a baffled metal – insulator – metal (MIM) waveguide coupled with a whispering gallery mode resonator (WGMR) is proposed. This structure could excite quadruple Fano resonances. The asymmetric Fano resonance transmittance spectrum and the electric field at the resonance peak were numerically simulated using the finite difference time domain method. The obtained data were fitted using the multimode interference coupled mode theory. The number of Fano resonance peaks was tuned by the outer radius of the WGMR. With other geometric parameters unchanged, the number of Fano resonance peaks increased with increasing outer radius of the WGMR. When the ring width was fixed, the structure could excite multiple Fano resonances within a certain outer radius range. This structure was used for refractive index sensing and its sensitivity and figure of merit (FOM) were 3004 nm/RIU and 3.14× 104 in a gas environment, respectively. Therefore, the proposed structure can excite multiple Fano resonances and achieve a high sensitivity and FOM, providing a theoretical basis for micro and nano applications.

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Resonator-based nanoscale plasmonic sensor made of metal–graphene–insulator interfaces

Lotfi,

Sang-Nourpour,

Kheradmand

2024

Results in Physics

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Fano resonance in whispering gallery mode microcavities and its sensing applications

Cited by 7 publications

References 104 publications

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

All-optical modulation of Fano-like resonances in apodized fiber Bragg grating using Er/Yb doped fiber

Multiple Fano resonances by MIM waveguide coupling whispering gallery mode resonator and application in Refractive index sensing

Resonator-based nanoscale plasmonic sensor made of metal–graphene–insulator interfaces

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