Microscopy of electric near-field waveforms (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Microscopy of electric near-field waveforms

Caption

a, Local electric fields inside a bowtie antenna are driven by an incident THz waveform. Femtosecond sampling pulses excite a layer of quantum dots covering the sample. The luminescence depends on the momentary THz field due to the quantum-confined Stark effect, enabling the microscopy of electric near-fields via imaging of visible photons. b, The QFIM signal in the bowtie gap resolves the near-field evolution, verified by electromagnetic simulations. c, QFIM snapshots of the bowtie structure at different sampling delays display 1.5 oscillation cycles of the near-field.

Credit

by Moritz B. Heindl, Nicholas Kirkwood, Tobias Lauster, Julia A. Lang, Markus Retsch, Paul Mulvaney, and Georg Herink

Usage Restrictions

Credit must be given to the creator.

License

CC BY

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