Browsing by Subject "Fano resonance"

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    ItemOpen Access
    Active control of Fano resonance with phase-change-based metasurface
    (Institute of Electrical and Electronics Engineers, 2024-09-30) Omam, Zahra Rahimian; Khalichi, Bahram; Osgouei, Ataollah Kalantari; Ghobadi, Amir; Khalily, Mohsen; Özbay, Ekmel
    This paper presents a phase-change-based metasurface absorber that can control the excitation of Fano resonance with temperature variations. The proposed thermally tunable metasurface-based configuration is designed based on strong coupling between the narrowband (discrete state) and broadband (continuum state) absorbers, leading to an excitation of Fano resonance within the infrared region.
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    ItemOpen Access
    Hybridization of fano and vibrational resonances in surface-enhanced infrared absorption spectroscopy of streptavidin monolayers on metamaterial substrates
    (2014) Alici, K. B.
    We present spectral hybridization of organic and inorganic resonant materials and related bio-sensing mechanism. We utilized a bound protein (streptavidin) and a Fano-resonant metasurface to illustrate the concept. The technique allows us to investigate the vibrational modes of the streptavidin and how they couple to the underlying metasurface. This optical, label-free, nonperturbative technique is supported by a coupled mode-theory analysis that provides information on the structure and orientation of bound proteins. We can also simultaneously monitor the binding of analytes to the surface through monitoring the shift of the metasurface resonance. All of this data opens up interesting opportunities for applications in biosensing, molecular electronics and proteomics. © 2014 IEEE.
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    ItemOpen Access
    Quantum dots on vertically aligned gold nanorod monolayer: plasmon enhanced fluorescence
    (Royal Society of Chemistry, 2014) Peng, B.; Li, Z.; Mutlugun, E.; Martinez, P. L. H.; Li, D.; Zhang, Q.; Gao, Y.; Demir, Hilmi Volkan; Xiong, Q.
    CTAB-coated Au nanorods were directly self-assembled into a vertically aligned monolayer with highly uniform hot spots through a simple but robust approach. By coupling with CdSe/ZnS quantum dots, a maximum enhancement of 10.4 is achieved due to: increased excitation transition rate, radiative rate, and coupling efficiency of emission to the far field.