Quantum-probe Field Microscope (QFIM) films THz-Nearfield Evolutions

Titelangaben

Heindl, Moritz ; Kirkwood, Nicholas ; Lauster, Tobias ; Lang, Julia ; Retsch, Markus ; Mulvaney, Paul ; Herink, Georg:
Quantum-probe Field Microscope (QFIM) films THz-Nearfield Evolutions.
In: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). - Piscataway, NJ : IEEE , 2022
ISBN 978-1-7281-9427-1
DOI: https://doi.org/10.1109/IRMMW-THz50927.2022.9895775

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Abstract

We demonstrate a novel ultrafast electric field microscopy for sub-wavelength and sub-cycle imaging of near-field waveforms at THz frequencies. Based on the fluorescence of semiconductor quantum-dots as local field probes, we acquire ultrafast movies of dynamic electric field evolutions inside broadband THz-antennas and of propagating THz-excitations in metallic waveguides using an optical microscope. This flexible scheme allows for local time-domain spectroscopy more than 100x below the diffraction limit and provides field-resolved access to field-driven and strong-field dynamics inside active metamaterials.