Research on terahertz wave detection of van der Waals [alpha]-MoO3 crystal based on hydrogen atom intercalations

Hongjia Zhu; Huanjun Chen

doi:10.1117/12.2575297

10 October 2020 Research on terahertz wave detection of van der Waals α-MoO₃ crystal based on hydrogen atom intercalations

Hongjia Zhu, Huanjun Chen

Author Affiliations +

Proceedings Volume 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII; 1155914 (2020) https://doi.org/10.1117/12.2575297
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

Terahertz (THz) waves, referring to electromagnetic waves with frequency range from 0.1 THz to 10 THz, have many novel and unique properties for a wide range of applications from security to medicine. However, it is relatively difficult to study the physical and chemical processes within this band due to limitation of sensitive terahertz detectors. As one of transition group metal oxides, two-dimensional van der Waals α-MoO3 crystal has relatively high carrier mobility and strong phonon polaritons effects. The relatively weak van der Waals forces between adjacent layers allow various atoms to easily enter into the crystal and interact with the lattice to produce defect states, enabling excellent optoelectronic conversion characteristics. In this study, we fabricate terahertz detectors based on hydrogen atom-intercalated α-MoO₃ two-dimensional crystal integrated with log-periodic antenna, which operate from 0.25 THz to 0.37 THz with a maximum optical responsivity of 0.04 V/W.

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Hongjia Zhu and Huanjun Chen "Research on terahertz wave detection of van der Waals α-MoO₃ crystal based on hydrogen atom intercalations", Proc. SPIE 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII, 1155914 (10 October 2020); https://doi.org/10.1117/12.2575297

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