Bruker FTIR Vertex 80v Light source: Hg-arc lamp

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Presentation transcript:

Bruker FTIR Vertex 80v Light source: Hg-arc lamp Beamsplitter: Multilayer Detector: DLaTGS AOI: cca 10° Mode: Reflectance (vs Au mirror) Vacuum: 1.6 mbar

Here are raw FTIR reflectance spectra (Bruker Vertex 80v) of the Au mirror (orange), reference Si substrate sample without antennas (grey), and 10 THz antenna array (red). Our samples show strong Fabry-Perot oscillations that we discard by low-pass FFT filtering (corresponding thick lines). Such filtered spectra of the antenna arrays are then divided by the filtered spectrum of the reference to get relative reflectance shown on slides below. Note that dividing by the Au mirror signal gives similar results (apart from small linear background) and that transmittance measurements (not shown) are fully complementary to these results.

2018-03-21 Diabolo PETER FTIR Simulations substrate: FZ Si 100, resistivity 300 - 500 Wcm Based on numerical simulations Nine arrays of gold nanoantennas for FTIR experiments were designed and fabricated for three frequencies (1, 3, 10 THz) and three pitches (1.5, 2, 4 Dx/Dy)

2018-03-21 Diabolo PETER FTIR

2018-10-01 2.5THz Diabolo Antenna arrays