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

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

2008-04-02

arxiv.org/abs/0804.0342v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

technical reasons

Scientific paper

10.1103/PhysRevB.77.245304

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.

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