Quantum ratchet effects induced by terahertz radiation in GaN-based two-dimensional structures

Abstract

Photogalvanic effects are observed and investigated in wurtzite (0001)-oriented GaN/AlGaN low-dimensional structures excited by terahertz radiation. The structures are shown to represent linear quantum ratchets. Experimental and theoretical analysis exhibits that the observed photocurrents are related to the lack of an inversion center in the GaN-based heterojunctions.

technical reasons

References in corpus (5)

• Semiclassical theories of the anomalous Hall effect
• Large Bychkov-Rashba spin-orbit coupling in high-mobility GaN/AlGaN heterostructures
• Orbital mechanism of the circular photogalvanic effect in quantum wells
• Spin orientation of a two-dimensional electron gas by a high-frequency electric field
• Magneto-gyrotropic photogalvanic effects in GaN/AlGaN two-dimensional systems

Cited by in corpus (2)

• Resonant circular photogalvanic effect in GaN/AlGaN heterojunctions
• Photogalvanic effect and photoconductance in a quantum channel with a single short-range scatterer