THz photocurrent magneto-oscillations in GaN-based asymmetric grating gate structures
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)(2021)
Abstract
We report THz induced ratchet photocurrent in AlGaN/GaN heterostructures superimposed with asymmetric dual-grating gate structure. The photocurrent shows giant magneto-oscillations in the regime of high magnetic fields. Peculiarly, the envelope of these oscillations exhibits large beatings as a function of the magnetic field. We demonstrate experimentally and theoretically that the beatings are caused by the spin-orbit interaction in GaN conduction band. Our results show how THz photoconductivity can be used for studies of spin dependent effects in GaN-based materials.
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Key words
photocurrent magneto-oscillations,induced ratchet photocurrent,giant magneto-oscillations,high magnetic fields,THz photoconductivity,GaN-based materials,asymmetric grating gate structures,conduction band,spin dependent effects,AlGaN-GaN
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