Imprinting the complex dielectric permittivity of liquids into the spintronic terahertz emission

Balos V, Muller P, Jakob G, Klaui M, Sajadi M (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 119

Article Number: 091104

Journal Issue: 9

DOI: 10.1063/5.0056909

Abstract

We report an approach in time-domain terahertz (THz) spectroscopy for measuring the dielectric response of liquids based on inherent properties of spintronic THz emitters (STEs). The THz electric field radiated from the STE is inversely proportional to the sum of the complex refractive indices of the media surrounding the thin metallic stack of the STE and the stack's conductivity. We demonstrate that by bringing a liquid in contact with the emitter, its complex refractive index and accordingly its dielectric response are imprinted into the radiated electromagnetic field from the emitter. We use water as the test liquid and ascertain its dielectric loss and permittivity in the range of ∼0.3-15 THz.

Involved external institutions

Fritz-Haber-Institut der Max-Planck-Gesellschaft (FHI) DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Balos, V., Muller, P., Jakob, G., Klaui, M., & Sajadi, M. (2021). Imprinting the complex dielectric permittivity of liquids into the spintronic terahertz emission. Applied Physics Letters, 119(9). https://doi.org/10.1063/5.0056909

MLA:

Balos, Vasileios, et al. "Imprinting the complex dielectric permittivity of liquids into the spintronic terahertz emission." Applied Physics Letters 119.9 (2021).

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