Optically modulated waveguide-coupled spintronic terahertz radiation emitters

Basem Y. Shahriar; Eric Hopmann; Abdulhakem Y. Elezzabi

doi:10.1117/12.2648399

13 March 2023 Optically modulated waveguide-coupled spintronic terahertz radiation emitters

Basem Y. Shahriar, Eric Hopmann, Abdulhakem Y. Elezzabi

Proceedings Volume 12420, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVI; 124200C (2023) https://doi.org/10.1117/12.2648399
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Increases in data bandwidth requirements are constantly pushing wireless communications networks to frequencies. With operating frequencies starting to approach the Terahertz (THz) band, it is important to develop compact, chip-based THz radiation sources that are compatible with both the semiconductor industry and the Si photonics scene. In recent years, spintronic THz emitters, thin film heterostructures with a stack thickness of 5 nm capable of producing THz pulses via femtosecond laser pulse excitation have been the subject of much interest due to their efficiency, small footprint, and ease of integration with various platforms. Here, we present spintronic THz radiation emitters on Si and SiO₂ substrates integrated with optical waveguides that allow for modulation of the generated THz radiation power by up to 87% via variation of the optical pump polarization. As a result of the gradual trend towards higher frequencies, we envision such structures as being utilised for various on-chip applications alongside electronic and photonic circuits.

Citation Download Citation

Basem Y. Shahriar, Eric Hopmann, and Abdulhakem Y. Elezzabi "Optically modulated waveguide-coupled spintronic terahertz radiation emitters", Proc. SPIE 12420, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVI, 124200C (13 March 2023); https://doi.org/10.1117/12.2648399

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