Impact of the dielectric duty factor on magnetic resonance in Ag-SiO2-Ag magnetic absorber

Highly sensitive refractive index sensor for detection of Hg2+ based on Fano-like resonance in metal–dielectric–metal meta-structure

“…All spectra demonstrate a Fano-like asymmetric lineshape, 15,29) but both the resonant wavelength location and the shape of the dips change slightly. The MR mode is decided by both the thickness of SiO 2 and the size of Au nano-patches, 26) changing the exposure dose of light would result in the size of the Au nano-patches varying, and the MR mode changes and its coupling with FP mode changes, this demonstrates that the Fano-like lineshape in Fig. 2(c) comes from the coupling of FP and MR.…”

“…Zhou's group had studied the phase change between MR and Fabry-Perot (FP) cavity mode in MDM in the microwave, as the spacer became thick, they found there was a transition from transverse MR to vertical FP mode. 25) In visible, we studied these phase change phenomena in the Ag-SiO 2 -Ag 26) system, and found that the phase change from MR to FP was a gradual process, and there was a zone where MR and FP coexist. Optical modes coupling is facile to manipulate in MDM, and many poverty condensed physical phenomena can be studied and used in the application.…”

“…In this work, we study the Fano resonance (FR) due to the coupling between FP and MR in Au-SiO 2 -Au MDM, and its application in mercury detection. Based on our previous works, 15,26,27) we design and manipulate their coupling using FDTD solution software, and then fabricate large-area samples using a stitched soft X-ray interference lithography technique, characterize their morphology using both an optical microscope and scanning electron microscope. Both the FR analysis and its application in mercury trace detection are performed through reflection spectra analysis using home-made UV-vis spectroscopy, which includes one Xenon lamp light source, sample holder, and photomultiplier spectrometer, where both the ingoing and outgoing light are all introduced by fibre, all spectra are detected at room temperature in the wavelength range of 450-900 nm, and an Al film is used as reference.…”