Abstract
We experimentally demonstrate modulation of reflectance in periodic arrays of subwavelength gallium arsenide nanocylinders with Mie-type resonances due to absorption saturation and changes in the refractive index of the semiconductor material of metasurface. The intensity-dependent reflectance modulation of up to 30% in the vicinity of the magnetic dipole resonance at a low laser fluence below 200 μJ/cm2 is shown by I-scan measurements.
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Zubyuk, V. V., Vabishchevich, P. P., Shcherbakov, M. R., Shorokhov, A. S., Fedotova, A. A., Liu, S., … Fedyanin, A. A. (2018). Intensity-dependent reflectance modulation of femtosecond laser pulses in GaAs nanocylinders with magnetic resonances. In Journal of Physics: Conference Series (Vol. 1092). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/1092/1/012181
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