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- W2328255103 abstract "Optical antennas represent an enabling technology for enhancing the detection of molecular vibrational signatures at low concentrations and probing the chemical composition of a sample in order to identify target molecules. However, efficiently detecting different vibrational modes to determine the presence (or the absence) of a molecular species requires a multispectral interrogation in a window of several micrometers, as many molecules present informative fingerprint spectra in the mid-infrared between 2.5 and 10 μm. As most nanoantennas exhibit a narrow-band response because of their dipolar nature, they are not suitable for such applications. Here, we propose the use of multifrequency optical antennas designed for operating with a bandwidth of several octaves. We demonstrate that surface-enhanced infrared absorption gains in the order of 105 can be easily obtained in a spectral window of 3 μm with attomolar concentrations of molecules, providing new opportunities for ultrasensitive broadband detection of molecular species via vibrational spectroscopy techniques." @default.
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- W2328255103 date "2012-12-07" @default.
- W2328255103 modified "2023-10-13" @default.
- W2328255103 title "Ultrasensitive Broadband Probing of Molecular Vibrational Modes with Multifrequency Optical Antennas" @default.
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- W2328255103 doi "https://doi.org/10.1021/nn304860t" @default.
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