DataVXAdvanced Optical MaterialsPaper
journal article·2024-09Open access

Large Mid‐Infrared Magneto‐Optic Response from Doped Cadmium Oxide at Its Epsilon‐Near‐Zero Frequency

Jonathon R. Schrecengost, Angela J. Cleri, Maxwell J. Tolchin, Ramya Mohan, John P. Murphy, Sara Adamkovic, Alex J. Grede, Mario V. Imperatore, Patrick E. Hopkins, Jon‐Paul Maria, Noel C. Giebink

Advanced Optical Materials· Volume 12· Issue 25
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Source abstract

Abstract

Abstract The epsilon‐near‐zero (ENZ) frequency regime of transparent conducting oxide materials is known to yield large enhancements in their optical nonlinearity and electro‐optic response. Here, Faraday rotation is investigated in Gd and In‐doped CdO films and it is found that the Verdet constant peaks at values >3 105 deg T−1 m−1 near the ENZ frequency, which is tunable in the wavelength range 2 < λ< 10 µm by varying the doping concentration. These results are among the highest reported to date in the mid‐infrared spectral range and are in good agreement with the Drude model, which confirms that the magneto‐optic response of doped CdO derives from its free carriers. The combination of a tunable Verdet constant, low optical loss compared to other plasmonic materials, and the ability to deposit CdO on Si with no loss in performance make this material a promising platform for integrated magneto‐optic and magnetoplasmonic devices that operate across the mid‐infrared.
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Research context

OpenAlex topics: Magneto-Optical Properties and Applications · Plasmonic and Surface Plasmon Research · Photonic and Optical Devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering The Pennsylvania State University University Park PA 16802 USA

Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA 22904 USA

Department of Materials Science and Engineering University of Virginia Charlottesville VA 22904 USA

Department of Electrical Engineering The Pennsylvania State University University Park PA 16802 USA

NRC postdoc residing at the US Naval Research Laboratory Washington DC 20375 USA

Department of Physics University of Virginia Charlottesville VA 22904 USA

Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109 USA

Funding

Army Research Office · Office of Naval Research Global · Division of Materials Research

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