Identical resonant features of THz photoconductivity and plasmon absorption in a grid-gated double-quantum well FET

摘要

We refine the determination of the equilibrium density distribution in a grid-gated double-quantum-well FET, taking account of screening in the system using the Poisson equation. This calculation provides requisite input information needed for the analysis of plasmon-mediated photoconductivity resonances observed in the recent experiments of Peralta et al. [Peralta XG, Allen SJ, Wanke MC, Harff NB, Simmons JA, Lilly MP, et al., Appl Phys Lett 2002;81:1627]. We show that the heights of the terahertz photocon-ductance peaks correlate with resonant terahertz plasmon absorbance.